Search a number
-
+
31130122 = 215565061
BaseRepresentation
bin111011011000…
…0001000001010
32011120120111111
41312300020022
530432130442
63031120534
7525413242
oct166601012
964516444
1031130122
1116632581
12a51314a
1365ac4ba
1441c4b22
152aedb17
hex1db020a

31130122 has 4 divisors (see below), whose sum is σ = 46695186. Its totient is φ = 15565060.

The previous prime is 31130101. The next prime is 31130147. The reversal of 31130122 is 22103113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22103113 = 47470279.

It can be written as a sum of positive squares in only one way, i.e., 30459361 + 670761 = 5519^2 + 819^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7782529 + ... + 7782532.

Almost surely, 231130122 is an apocalyptic number.

31130122 is a deficient number, since it is larger than the sum of its proper divisors (15565064).

31130122 is a wasteful number, since it uses less digits than its factorization.

31130122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15565063.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 31130122 is about 5579.4374268379. The cubic root of 31130122 is about 314.5769815168.

Adding to 31130122 its reverse (22103113), we get a palindrome (53233235).

The spelling of 31130122 in words is "thirty-one million, one hundred thirty thousand, one hundred twenty-two".

Divisors: 1 2 15565061 31130122