31261116 has 24 divisors (see below), whose sum is σ = 73667664. Its totient is φ = 10316800.

The previous prime is 31261093. The next prime is 31261121. The reversal of 31261116 is 61116213.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31261092 and 31261101.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11685 + ... + 14108.

It is an arithmetic number, because the mean of its divisors is an integer number (3069486).

Almost surely, 2^31261116 is an apocalyptic number.

It is an amenable number.

31261116 is an abundant number, since it is smaller than the sum of its proper divisors (42406548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31261116 is a wasteful number, since it uses less digits than its factorization.

31261116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25901 (or 25899 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

The square root of 31261116 is about 5591.1641006145. The cubic root of 31261116 is about 315.0176054660.

Adding to 31261116 its reverse (61116213), we get a palindrome (92377329).

The spelling of 31261116 in words is "thirty-one million, two hundred sixty-one thousand, one hundred sixteen".