31013133031 has 12 divisors (see below), whose sum is σ = 33027853288. Its totient is φ = 29115199872.

The previous prime is 31013133029. The next prime is 31013133071. The reversal of 31013133031 is 13033131013.

It is a happy number.

It is not a de Polignac number, because 31013133031 - 2¹ = 31013133029 is a prime.

It is a super-2 number, since 2×31013133031² (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 (31013133071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20421 + ... + 249886.

Almost surely, 2^31013133031 is an apocalyptic number.

31013133031 is a deficient number, since it is larger than the sum of its proper divisors (2014720257).

31013133031 is a wasteful number, since it uses less digits than its factorization.

31013133031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270738 (or 270721 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31013133031 its reverse (13033131013), we get a palindrome (44046264044).

The spelling of 31013133031 in words is "thirty-one billion, thirteen million, one hundred thirty-three thousand, thirty-one".