31424252 has 12 divisors (see below), whose sum is σ = 57886920. Its totient is φ = 14885136.

The previous prime is 31424251. The next prime is 31424287. The reversal of 31424252 is 25242413.

It is a happy number.

It is a super-2 number, since 2×31424252² = 1974967227519008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206663 + ... + 206814.

It is an arithmetic number, because the mean of its divisors is an integer number (4823910).

Almost surely, 2^31424252 is an apocalyptic number.

It is an amenable number.

31424252 is a deficient number, since it is larger than the sum of its proper divisors (26462668).

31424252 is a wasteful number, since it uses less digits than its factorization.

31424252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413500 (or 413498 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 31424252 is about 5605.7338502644. The cubic root of 31424252 is about 315.5646276973.

Adding to 31424252 its reverse (25242413), we get a palindrome (56666665).

The spelling of 31424252 in words is "thirty-one million, four hundred twenty-four thousand, two hundred fifty-two".