31423522 has 24 divisors (see below), whose sum is σ = 52704000. Its totient is φ = 14030640.

The previous prime is 31423517. The next prime is 31423523. The reversal of 31423522 is 22532413.

It is a junction number, because it is equal to n+sod(n) for n = 31423493 and 31423502.

It is not an unprimeable number, because it can be changed into a prime (31423523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8979 + ... + 11977.

It is an arithmetic number, because the mean of its divisors is an integer number (2196000).

Almost surely, 2^31423522 is an apocalyptic number.

31423522 is a deficient number, since it is larger than the sum of its proper divisors (21280478).

31423522 is a wasteful number, since it uses less digits than its factorization.

31423522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058 (or 3045 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 31423522 is about 5605.6687379830. The cubic root of 31423522 is about 315.5621841073.

Adding to 31423522 its reverse (22532413), we get a palindrome (53955935).

The spelling of 31423522 in words is "thirty-one million, four hundred twenty-three thousand, five hundred twenty-two".