31621094 has 4 divisors (see below), whose sum is σ = 47431644. Its totient is φ = 15810546.

The previous prime is 31621081. The next prime is 31621097. The reversal of 31621094 is 49012613.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31621097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7905272 + ... + 7905275.

It is an arithmetic number, because the mean of its divisors is an integer number (11857911).

Almost surely, 2^31621094 is an apocalyptic number.

31621094 is a deficient number, since it is larger than the sum of its proper divisors (15810550).

31621094 is a wasteful number, since it uses less digits than its factorization.

31621094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15810549.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 31621094 is about 5623.2636431169. The cubic root of 31621094 is about 316.2221572451. Note that the first 3 decimals are identical.

The spelling of 31621094 in words is "thirty-one million, six hundred twenty-one thousand, ninety-four".