31612091 has 16 divisors (see below), whose sum is σ = 37134528. Its totient is φ = 26352000.

The previous prime is 31612081. The next prime is 31612109. The reversal of 31612091 is 19021613.

It is a happy number.

It is not a de Polignac number, because 31612091 - 2¹⁰ = 31611067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31612081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42761 + ... + 43493.

It is an arithmetic number, because the mean of its divisors is an integer number (2320908).

Almost surely, 2^31612091 is an apocalyptic number.

31612091 is a deficient number, since it is larger than the sum of its proper divisors (5522437).

31612091 is a wasteful number, since it uses less digits than its factorization.

31612091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 31612091 is about 5622.4630723554. The cubic root of 31612091 is about 316.1921433319.

The spelling of 31612091 in words is "thirty-one million, six hundred twelve thousand, ninety-one".