31236074216 has 8 divisors (see below), whose sum is σ = 58567639170. Its totient is φ = 15618037104.

The previous prime is 31236074213. The next prime is 31236074237. The reversal of 31236074216 is 61247063213.

It can be written as a sum of positive squares in only one way, i.e., 20491922500 + 10744151716 = 143150^2 + 103654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (31236074213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1952254631 + ... + 1952254646.

Almost surely, 2^31236074216 is an apocalyptic number.

It is an amenable number.

31236074216 is a deficient number, since it is larger than the sum of its proper divisors (27331564954).

31236074216 is a wasteful number, since it uses less digits than its factorization.

31236074216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904509283 (or 3904509279 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 31236074216 in words is "thirty-one billion, two hundred thirty-six million, seventy-four thousand, two hundred sixteen".