31590641 has 8 divisors (see below), whose sum is σ = 33504840. Its totient is φ = 29682688.

The previous prime is 31590631. The next prime is 31590649. The reversal of 31590641 is 14609513.

It can be written as a sum of positive squares in 4 ways, for example, as 14409616 + 17181025 = 3796^2 + 4145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31590641 - 2²² = 27396337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31590649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12605 + ... + 14901.

It is an arithmetic number, because the mean of its divisors is an integer number (4188105).

Almost surely, 2^31590641 is an apocalyptic number.

It is an amenable number.

31590641 is a deficient number, since it is larger than the sum of its proper divisors (1914199).

31590641 is a wasteful number, since it uses less digits than its factorization.

31590641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 31590641 is about 5620.5552216841. Note that the first 3 decimals coincide. The cubic root of 31590641 is about 316.1206110388.

The spelling of 31590641 in words is "thirty-one million, five hundred ninety thousand, six hundred forty-one".