31131070471660 has 12 divisors (see below), whose sum is σ = 65375247990528. Its totient is φ = 12452428188656.

The previous prime is 31131070471597. The next prime is 31131070471663. The reversal of 31131070471660 is 6617407013113.

It is a happy number.

It is a super-2 number, since 2×31131070471660² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31131070471663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 778276761772 + ... + 778276761811.

It is an arithmetic number, because the mean of its divisors is an integer number (5447937332544).

Almost surely, 2^{31131070471660} is an apocalyptic number.

It is an amenable number.

31131070471660 is an abundant number, since it is smaller than the sum of its proper divisors (34244177518868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31131070471660 is a wasteful number, since it uses less digits than its factorization.

31131070471660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556553523592 (or 1556553523590 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 40.

Adding to 31131070471660 its reverse (6617407013113), we get a palindrome (37748477484773).

The spelling of 31131070471660 in words is "thirty-one trillion, one hundred thirty-one billion, seventy million, four hundred seventy-one thousand, six hundred sixty".