31123031137 has 16 divisors (see below), whose sum is σ = 34182134784. Its totient is φ = 28102672000.

The previous prime is 31123031117. The next prime is 31123031143. The reversal of 31123031137 is 73113032113.

It is a cyclic number.

It is not a de Polignac number, because 31123031137 - 2¹⁵ = 31122998369 is a prime.

It is a super-4 number, since 4×31123031137⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123031117) 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, 1411437 + ... + 1433317.

It is an arithmetic number, because the mean of its divisors is an integer number (2136383424).

Almost surely, 2^31123031137 is an apocalyptic number.

It is an amenable number.

31123031137 is a deficient number, since it is larger than the sum of its proper divisors (3059103647).

31123031137 is a wasteful number, since it uses less digits than its factorization.

31123031137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22760.

The product of its (nonzero) digits is 1134, while the sum is 25.

The spelling of 31123031137 in words is "thirty-one billion, one hundred twenty-three million, thirty-one thousand, one hundred thirty-seven".