31133133031 has 64 divisors (see below), whose sum is σ = 44092984320. Its totient is φ = 21170626560.

The previous prime is 31133133023. The next prime is 31133133047. The reversal of 31133133031 is 13033133113.

It is a cyclic number.

It is not a de Polignac number, because 31133133031 - 2³ = 31133133023 is a prime.

It is a super-2 number, since 2×31133133031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31133132993 and 31133133011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31133133011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10972545 + ... + 10975381.

It is an arithmetic number, because the mean of its divisors is an integer number (688952880).

Almost surely, 2^31133133031 is an apocalyptic number.

31133133031 is a deficient number, since it is larger than the sum of its proper divisors (12959851289).

31133133031 is a wasteful number, since it uses less digits than its factorization.

31133133031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464.

The product of its (nonzero) digits is 729, while the sum is 22.

Adding to 31133133031 its reverse (13033133113), we get a palindrome (44166266144).

The spelling of 31133133031 in words is "thirty-one billion, one hundred thirty-three million, one hundred thirty-three thousand, thirty-one".