31161896 has 16 divisors (see below), whose sum is σ = 58490100. Its totient is φ = 15564544.

The previous prime is 31161869. The next prime is 31161917. The reversal of 31161896 is 69816113.

It can be written as a sum of positive squares in 2 ways, for example, as 29920900 + 1240996 = 5470^2 + 1114^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10640 + ... + 13248.

Almost surely, 2^31161896 is an apocalyptic number.

It is an amenable number.

31161896 is a deficient number, since it is larger than the sum of its proper divisors (27328204).

31161896 is a wasteful number, since it uses less digits than its factorization.

31161896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4104 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 31161896 is about 5582.2841203221. The cubic root of 31161896 is about 314.6839729621.

The spelling of 31161896 in words is "thirty-one million, one hundred sixty-one thousand, eight hundred ninety-six".