31133190916 has 9 divisors (see below), whose sum is σ = 54483701671. Its totient is φ = 15566419012.

The previous prime is 31133190901. The next prime is 31133190947. The reversal of 31133190916 is 61909133113.

The square root of 31133190916 is 176446.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×31133190916² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 308781 + ... + 397003.

Almost surely, 2^31133190916 is an apocalyptic number.

31133190916 is the 176446-th square number.

It is an amenable number.

31133190916 is a deficient number, since it is larger than the sum of its proper divisors (23350510755).

31133190916 is an frugal number, since it uses more digits than its factorization.

31133190916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176450 (or 88225 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 37.

The spelling of 31133190916 in words is "thirty-one billion, one hundred thirty-three million, one hundred ninety thousand, nine hundred sixteen".