31132165216 has 12 divisors (see below), whose sum is σ = 61291450332. Its totient is φ = 15566082592.

The previous prime is 31132165199. The next prime is 31132165237. The reversal of 31132165216 is 61256123113.

It is a super-2 number, since 2×31132165216² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486440050 + ... + 486440113.

It is an arithmetic number, because the mean of its divisors is an integer number (5107620861).

Almost surely, 2^31132165216 is an apocalyptic number.

It is an amenable number.

31132165216 is a deficient number, since it is larger than the sum of its proper divisors (30159285116).

31132165216 is an equidigital number, since it uses as much as digits as its factorization.

31132165216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972880173 (or 972880165 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

Adding to 31132165216 its reverse (61256123113), we get a palindrome (92388288329).

The spelling of 31132165216 in words is "thirty-one billion, one hundred thirty-two million, one hundred sixty-five thousand, two hundred sixteen".