31816053993 has 16 divisors (see below), whose sum is σ = 43728906240. Its totient is φ = 20565388176.

The previous prime is 31816053991. The next prime is 31816054003. The reversal of 31816053993 is 39935061813.

It is not a de Polignac number, because 31816053993 - 2¹ = 31816053991 is a prime.

It is a super-2 number, since 2×31816053993² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31816053991) 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, 1039333 + ... + 1069506.

It is an arithmetic number, because the mean of its divisors is an integer number (2733056640).

Almost surely, 2^31816053993 is an apocalyptic number.

It is an amenable number.

31816053993 is a deficient number, since it is larger than the sum of its proper divisors (11912852247).

31816053993 is a wasteful number, since it uses less digits than its factorization.

31816053993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108996.

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 31816053993 in words is "thirty-one billion, eight hundred sixteen million, fifty-three thousand, nine hundred ninety-three".