31423532 has 12 divisors (see below), whose sum is σ = 62847120. Its totient is φ = 13467216.

The previous prime is 31423529. The next prime is 31423573. The reversal of 31423532 is 23532413.

31423532 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 31423498 and 31423507.

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, 561107 + ... + 561162.

It is an arithmetic number, because the mean of its divisors is an integer number (5237260).

Almost surely, 2^31423532 is an apocalyptic number.

It is an amenable number.

31423532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31423532 is a wasteful number, since it uses less digits than its factorization.

31423532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122280 (or 1122278 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 31423532 is about 5605.6696299372. The cubic root of 31423532 is about 315.5622175814.

Adding to 31423532 its reverse (23532413), we get a palindrome (54955945).

The spelling of 31423532 in words is "thirty-one million, four hundred twenty-three thousand, five hundred thirty-two".