Search a number
-
+
31373050554 = 23217891151981
BaseRepresentation
bin11101001101111110…
…101100001010111010
32222222102221002122100
4131031332230022322
51003223000104204
622225041204230
72160311346456
oct351576541272
988872832570
1031373050554
111233a2a625a
1260b6930676
132c5c999251
141738943666
15c39448a39
hex74dfac2ba

31373050554 has 48 divisors (see below), whose sum is σ = 72782222760. Its totient is φ = 9731927040.

The previous prime is 31373050523. The next prime is 31373050573. The reversal of 31373050554 is 45505037313.

31373050554 is a `hidden beast` number, since 31 + 3 + 73 + 0 + 5 + 0 + 554 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30805515225 + 567535329 = 175515^2 + 23823^2 .

It is a super-4 number, since 4×313730505544 (a number of 43 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 548757 + ... + 603224.

Almost surely, 231373050554 is an apocalyptic number.

31373050554 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31373050554 is an abundant number, since it is smaller than the sum of its proper divisors (41409172206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31373050554 is a wasteful number, since it uses less digits than its factorization.

31373050554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152095 (or 1152092 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 36.

Adding to 31373050554 its reverse (45505037313), we get a palindrome (76878087867).

The spelling of 31373050554 in words is "thirty-one billion, three hundred seventy-three million, fifty thousand, five hundred fifty-four".

Divisors: 1 2 3 6 9 17 18 34 51 89 102 153 178 267 306 534 801 1513 1602 3026 4539 9078 13617 27234 1151981 2303962 3455943 6911886 10367829 19583677 20735658 39167354 58751031 102526309 117502062 176253093 205052618 307578927 352506186 615157854 922736781 1742947253 1845473562 3485894506 5228841759 10457683518 15686525277 31373050554