31113200231 has 4 divisors (see below), whose sum is σ = 31178155200. Its totient is φ = 31048245264.

The previous prime is 31113200197. The next prime is 31113200291. The reversal of 31113200231 is 13200231113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31113200231 - 2²⁶ = 31046091367 is a prime.

It is a super-2 number, since 2×31113200231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113200291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32476766 + ... + 32477723.

It is an arithmetic number, because the mean of its divisors is an integer number (7794538800).

Almost surely, 2^31113200231 is an apocalyptic number.

31113200231 is a deficient number, since it is larger than the sum of its proper divisors (64954969).

31113200231 is an equidigital number, since it uses as much as digits as its factorization.

31113200231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64954968.

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

Adding to 31113200231 its reverse (13200231113), we get a palindrome (44313431344).

The spelling of 31113200231 in words is "thirty-one billion, one hundred thirteen million, two hundred thousand, two hundred thirty-one".