31081077 has 20 divisors (see below), whose sum is σ = 46638240. Its totient is φ = 20627784.

The previous prime is 31081021. The next prime is 31081097. The reversal of 31081077 is 77018013.

It is not a de Polignac number, because 31081077 - 2⁶ = 31081013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 31081077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31081097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20574 + ... + 22032.

It is an arithmetic number, because the mean of its divisors is an integer number (2331912).

Almost surely, 2^31081077 is an apocalyptic number.

It is an amenable number.

31081077 is a deficient number, since it is larger than the sum of its proper divisors (15557163).

31081077 is a wasteful number, since it uses less digits than its factorization.

31081077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 31081077 is about 5575.0405379692. The cubic root of 31081077 is about 314.4116910459.

The spelling of 31081077 in words is "thirty-one million, eighty-one thousand, seventy-seven".