31060890081 has 27 divisors (see below), whose sum is σ = 48593170899. Its totient is φ = 19110164112.

The previous prime is 31060890013. The next prime is 31060890089. The reversal of 31060890081 is 18009806013.

The square root of 31060890081 is 176241.

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

It can be written as a sum of positive squares in only one way, i.e., 4594806225 + 26466083856 = 67785^2 + 162684^2 .

It is not a de Polignac number, because 31060890081 - 2⁹ = 31060889569 is a prime.

It is a super-2 number, since 2×31060890081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31060890089) 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, 6871140 + ... + 6875658.

Almost surely, 2^31060890081 is an apocalyptic number.

31060890081 is the 176241-st square number.

31060890081 is the 88121-st centered octagonal number.

It is an amenable number.

31060890081 is a deficient number, since it is larger than the sum of its proper divisors (17532280818).

31060890081 is an frugal number, since it uses more digits than its factorization.

31060890081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9070 (or 4535 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

Multiplying 31060890081 by its sum of digits (36), we get a square (1118192042916 = 1057446²).

It can be divided in two parts, 310608 and 90081, that added together give a square (400689 = 633²).

The spelling of 31060890081 in words is "thirty-one billion, sixty million, eight hundred ninety thousand, eighty-one".