Search a number
-
+
31230311201 = 431231589997
BaseRepresentation
bin11101000101011110…
…001011101100100001
32222121111100012001122
4131011132023230201
51002424424424301
622202541542025
72153626156655
oct350536135441
988544305048
1031230311201
1112276773051
126076b74915
132c392400ab
1417239c8a65
15c2bb5081b
hex74578bb21

31230311201 has 8 divisors (see below), whose sum is σ = 31982611584. Its totient is φ = 30479193360.

The previous prime is 31230311171. The next prime is 31230311213. The reversal of 31230311201 is 10211303213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31230311201 - 214 = 31230294817 is a prime.

It is a super-2 number, since 2×312303112012 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31230311201.

It is not an unprimeable number, because it can be changed into a prime (31230311701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242066 + ... + 347931.

It is an arithmetic number, because the mean of its divisors is an integer number (3997826448).

Almost surely, 231230311201 is an apocalyptic number.

It is an amenable number.

31230311201 is a deficient number, since it is larger than the sum of its proper divisors (752300383).

31230311201 is a wasteful number, since it uses less digits than its factorization.

31230311201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591271.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31230311201 its reverse (10211303213), we get a palindrome (41441614414).

The spelling of 31230311201 in words is "thirty-one billion, two hundred thirty million, three hundred eleven thousand, two hundred one".

Divisors: 1 43 1231 52933 589997 25369871 726286307 31230311201