31166021612 has 24 divisors (see below), whose sum is σ = 59504909520. Its totient is φ = 14164911360.

The previous prime is 31166021599. The next prime is 31166021657. The reversal of 31166021612 is 21612066113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 475064 + ... + 536672.

It is an arithmetic number, because the mean of its divisors is an integer number (2479371230).

Almost surely, 2^31166021612 is an apocalyptic number.

It is an amenable number.

31166021612 is a deficient number, since it is larger than the sum of its proper divisors (28338887908).

31166021612 is a wasteful number, since it uses less digits than its factorization.

31166021612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73121 (or 73119 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 31166021612 its reverse (21612066113), we get a palindrome (52778087725).

The spelling of 31166021612 in words is "thirty-one billion, one hundred sixty-six million, twenty-one thousand, six hundred twelve".