31623042 has 16 divisors (see below), whose sum is σ = 68995872. Its totient is φ = 9582720.

The previous prime is 31623041. The next prime is 31623047. The reversal of 31623042 is 24032613.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31623041) 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, 239503 + ... + 239634.

It is an arithmetic number, because the mean of its divisors is an integer number (4312242).

Almost surely, 2^31623042 is an apocalyptic number.

31623042 is an abundant number, since it is smaller than the sum of its proper divisors (37372830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31623042 is a wasteful number, since it uses less digits than its factorization.

31623042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479153.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 31623042 is about 5623.4368494720. The cubic root of 31623042 is about 316.2286506754.

Adding to 31623042 its reverse (24032613), we get a palindrome (55655655).

The spelling of 31623042 in words is "thirty-one million, six hundred twenty-three thousand, forty-two".