31004194195881 has 27 divisors (see below), whose sum is σ = 45531529156503. Its totient is φ = 20329950967920.

The previous prime is 31004194195867. The next prime is 31004194195951. The reversal of 31004194195881 is 18859149140013.

The square root of 31004194195881 is 5568141.

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

31004194195881 is a `hidden beast` number, since 3 + 1 + 0 + 0 + 4 + 19 + 41 + 9 + 588 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1008198736281 + 29995995459600 = 1004091^2 + 5476860^2 .

It is not a de Polignac number, because 31004194195881 - 2¹⁵ = 31004194163113 is a prime.

It is a super-2 number, since 2×31004194195881² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31004194195841) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1018954590 + ... + 1018985016.

Almost surely, 2^{31004194195881} is an apocalyptic number.

31004194195881 is the 5568141-st square number.

31004194195881 is the 2784071-st centered octagonal number.

It is an amenable number.

31004194195881 is a deficient number, since it is larger than the sum of its proper divisors (14527334960622).

31004194195881 is an frugal number, since it uses more digits than its factorization.

31004194195881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60982 (or 30491 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 31004194195881 in words is "thirty-one trillion, four billion, one hundred ninety-four million, one hundred ninety-five thousand, eight hundred eighty-one".