31423022 has 4 divisors (see below), whose sum is σ = 47134536. Its totient is φ = 15711510.

The previous prime is 31422997. The next prime is 31423033. The reversal of 31423022 is 22032413.

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

It is a super-2 number, since 2×31423022² = 1974812623224968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 7855754 + ... + 7855757.

It is an arithmetic number, because the mean of its divisors is an integer number (11783634).

Almost surely, 2^31423022 is an apocalyptic number.

31423022 is a deficient number, since it is larger than the sum of its proper divisors (15711514).

31423022 is a wasteful number, since it uses less digits than its factorization.

31423022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711513.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31423022 is about 5605.6241400936. The cubic root of 31423022 is about 315.5605103937.

Adding to 31423022 its reverse (22032413), we get a palindrome (53455435).

The spelling of 31423022 in words is "thirty-one million, four hundred twenty-three thousand, twenty-two".