31081055 has 16 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 23107968.

The previous prime is 31081021. The next prime is 31081097. The reversal of 31081055 is 55018013.

It is a cyclic number.

It is not a de Polignac number, because 31081055 - 2¹⁰ = 31080031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31081055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949 + ... + 8121.

It is an arithmetic number, because the mean of its divisors is an integer number (2500470).

Almost surely, 2^31081055 is an apocalyptic number.

31081055 is a deficient number, since it is larger than the sum of its proper divisors (8926465).

31081055 is a wasteful number, since it uses less digits than its factorization.

31081055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6250.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 31081055 is about 5575.0385648890. The cubic root of 31081055 is about 314.4116168630.

Adding to 31081055 its reverse (55018013), we get a palindrome (86099068).

The spelling of 31081055 in words is "thirty-one million, eighty-one thousand, fifty-five".