31311056061 has 32 divisors (see below), whose sum is σ = 49628668800. Its totient is φ = 19451197440.

The previous prime is 31311056053. The next prime is 31311056113. The reversal of 31311056061 is 16065011313.

31311056061 is a `hidden beast` number, since 3 + 1 + 31 + 10 + 560 + 61 = 666.

It is not a de Polignac number, because 31311056061 - 2³ = 31311056053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311056041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 468996 + ... + 531581.

It is an arithmetic number, because the mean of its divisors is an integer number (1550895900).

Almost surely, 2^31311056061 is an apocalyptic number.

It is an amenable number.

31311056061 is a deficient number, since it is larger than the sum of its proper divisors (18317612739).

31311056061 is a wasteful number, since it uses less digits than its factorization.

31311056061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000666 (or 1000660 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 31311056061 its reverse (16065011313), we get a palindrome (47376067374).

The spelling of 31311056061 in words is "thirty-one billion, three hundred eleven million, fifty-six thousand, sixty-one".