31160055561 has 8 divisors (see below), whose sum is σ = 41548746624. Its totient is φ = 20772367440.

The previous prime is 31160055551. The next prime is 31160055583. The reversal of 31160055561 is 16555006113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31160055561 - 2²⁵ = 31126501129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31160055551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174970 + ... + 304851.

It is an arithmetic number, because the mean of its divisors is an integer number (5193593328).

Almost surely, 2^31160055561 is an apocalyptic number.

It is an amenable number.

31160055561 is a deficient number, since it is larger than the sum of its proper divisors (10388691063).

31160055561 is a wasteful number, since it uses less digits than its factorization.

31160055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501471.

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 31160055561 in words is "thirty-one billion, one hundred sixty million, fifty-five thousand, five hundred sixty-one".