31421132 has 12 divisors (see below), whose sum is σ = 56266056. Its totient is φ = 15345120.

The previous prime is 31421111. The next prime is 31421141. The reversal of 31421132 is 23112413.

It is a super-2 number, since 2×31421132² = 1974575072322848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31421132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91169 + ... + 91512.

It is an arithmetic number, because the mean of its divisors is an integer number (4688838).

Almost surely, 2^31421132 is an apocalyptic number.

It is an amenable number.

31421132 is a deficient number, since it is larger than the sum of its proper divisors (24844924).

31421132 is a wasteful number, since it uses less digits than its factorization.

31421132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182728 (or 182726 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 31421132 is about 5605.4555568660. The cubic root of 31421132 is about 315.5541835959.

Adding to 31421132 its reverse (23112413), we get a palindrome (54533545).

The spelling of 31421132 in words is "thirty-one million, four hundred twenty-one thousand, one hundred thirty-two".