31231132200019 has 12 divisors (see below), whose sum is σ = 33054764005656. Its totient is φ = 29503571315328.

The previous prime is 31231132199963. The next prime is 31231132200029. The reversal of 31231132200019 is 91000223113213.

It is a de Polignac number, because none of the positive numbers 2^k-31231132200019 is a prime.

It is a super-2 number, since 2×31231132200019² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31231132200019.

It is not an unprimeable number, because it can be changed into a prime (31231132200029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122411989 + ... + 122666854.

It is an arithmetic number, because the mean of its divisors is an integer number (2754563667138).

Almost surely, 2^{31231132200019} is an apocalyptic number.

31231132200019 is a deficient number, since it is larger than the sum of its proper divisors (1823631805637).

31231132200019 is a wasteful number, since it uses less digits than its factorization.

31231132200019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245079234 (or 245079215 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 31231132200019 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-two million, two hundred thousand, nineteen".