31632661 has 4 divisors (see below), whose sum is σ = 31683424. Its totient is φ = 31581900.

The previous prime is 31632637. The next prime is 31632691. The reversal of 31632661 is 16623613.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31632661 is a prime.

It is a Duffinian number.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24435 + ... + 25696.

It is an arithmetic number, because the mean of its divisors is an integer number (7920856).

Almost surely, 2^31632661 is an apocalyptic number.

It is an amenable number.

31632661 is a deficient number, since it is larger than the sum of its proper divisors (50763).

31632661 is an equidigital number, since it uses as much as digits as its factorization.

31632661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50762.

The product of its digits is 3888, while the sum is 28.

The square root of 31632661 is about 5624.2920443377. The cubic root of 31632661 is about 316.2607105789.

The spelling of 31632661 in words is "thirty-one million, six hundred thirty-two thousand, six hundred sixty-one".