31145937 has 16 divisors (see below), whose sum is σ = 42806400. Its totient is φ = 20131200.

The previous prime is 31145909. The next prime is 31145941. The reversal of 31145937 is 73954113.

It is not a de Polignac number, because 31145937 - 2¹⁰ = 31144913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31145898 and 31145907.

It is not an unprimeable number, because it can be changed into a prime (31145957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21564 + ... + 22962.

It is an arithmetic number, because the mean of its divisors is an integer number (2675400).

Almost surely, 2^31145937 is an apocalyptic number.

It is an amenable number.

31145937 is a deficient number, since it is larger than the sum of its proper divisors (11660463).

31145937 is a wasteful number, since it uses less digits than its factorization.

31145937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its digits is 11340, while the sum is 33.

The square root of 31145937 is about 5580.8545044643. The cubic root of 31145937 is about 314.6302438920.

The spelling of 31145937 in words is "thirty-one million, one hundred forty-five thousand, nine hundred thirty-seven".