31421522 has 12 divisors (see below), whose sum is σ = 51806958. Its totient is φ = 14282400.

The previous prime is 31421479. The next prime is 31421557. The reversal of 31421522 is 22512413.

It can be written as a sum of positive squares in only one way, i.e., 24393721 + 7027801 = 4939^2 + 2651^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31421494 and 31421503.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64679 + ... + 65162.

Almost surely, 2^31421522 is an apocalyptic number.

31421522 is a deficient number, since it is larger than the sum of its proper divisors (20385436).

31421522 is a wasteful number, since it uses less digits than its factorization.

31421522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129865 (or 129854 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 31421522 is about 5605.4903442964. The cubic root of 31421522 is about 315.5554891464. Note that the first 3 decimals are identical.

Adding to 31421522 its reverse (22512413), we get a palindrome (53933935).

It can be divided in two parts, 3142 and 1522, that added together give a palindrome (4664).

The spelling of 31421522 in words is "thirty-one million, four hundred twenty-one thousand, five hundred twenty-two".