31632641 has 4 divisors (see below), whose sum is σ = 31666992. Its totient is φ = 31598292.

The previous prime is 31632637. The next prime is 31632691. The reversal of 31632641 is 14623613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14623613 = 2549 ⋅5737.

It is a cyclic number.

It is not a de Polignac number, because 31632641 - 2² = 31632637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31632641.

It is not an unprimeable number, because it can be changed into a prime (31632691) 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 3 ways as a sum of consecutive naturals, for example, 15755 + ... + 17648.

It is an arithmetic number, because the mean of its divisors is an integer number (7916748).

Almost surely, 2^31632641 is an apocalyptic number.

It is an amenable number.

31632641 is a deficient number, since it is larger than the sum of its proper divisors (34351).

31632641 is an equidigital number, since it uses as much as digits as its factorization.

31632641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34350.

The product of its digits is 2592, while the sum is 26.

The square root of 31632641 is about 5624.2902663358. The cubic root of 31632641 is about 316.2606439262.

Subtracting from 31632641 its reverse (14623613), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 31632641 in words is "thirty-one million, six hundred thirty-two thousand, six hundred forty-one".