31163406621 has 24 divisors (see below), whose sum is σ = 42840534240. Its totient is φ = 20135621952.

The previous prime is 31163406569. The next prime is 31163406623. The reversal of 31163406621 is 12660436113.

It is not a de Polignac number, because 31163406621 - 2¹⁵ = 31163373853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31163406623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8515090 + ... + 8518748.

It is an arithmetic number, because the mean of its divisors is an integer number (1785022260).

Almost surely, 2^31163406621 is an apocalyptic number.

It is an amenable number.

31163406621 is a deficient number, since it is larger than the sum of its proper divisors (11677127619).

31163406621 is an equidigital number, since it uses as much as digits as its factorization.

31163406621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 31163406621 in words is "thirty-one billion, one hundred sixty-three million, four hundred six thousand, six hundred twenty-one".