31073031 has 16 divisors (see below), whose sum is σ = 50219520. Its totient is φ = 18831960.

The previous prime is 31073027. The next prime is 31073041. The reversal of 31073031 is 13037013.

It is not a de Polignac number, because 31073031 - 2² = 31073027 is a prime.

It is a super-2 number, since 2×31073031² = 1931066511053922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31072995 and 31073013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31073041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52015 + ... + 52608.

It is an arithmetic number, because the mean of its divisors is an integer number (3138720).

Almost surely, 2^31073031 is an apocalyptic number.

31073031 is a deficient number, since it is larger than the sum of its proper divisors (19146489).

31073031 is a wasteful number, since it uses less digits than its factorization.

31073031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104643 (or 104637 counting only the distinct ones).

The product of its (nonzero) digits is 189, while the sum is 18.

The square root of 31073031 is about 5574.3188821595. The cubic root of 31073031 is about 314.3845579794.

The spelling of 31073031 in words is "thirty-one million, seventy-three thousand, thirty-one".