31445252 has 12 divisors (see below), whose sum is σ = 55115676. Its totient is φ = 15697920.

The previous prime is 31445243. The next prime is 31445263. The reversal of 31445252 is 25254413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13075456 + 18369796 = 3616^2 + 4286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3149 + ... + 8532.

It is an arithmetic number, because the mean of its divisors is an integer number (4592973).

Almost surely, 2^31445252 is an apocalyptic number.

It is an amenable number.

31445252 is a deficient number, since it is larger than the sum of its proper divisors (23670424).

31445252 is a wasteful number, since it uses less digits than its factorization.

31445252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358 (or 12356 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 31445252 is about 5607.6066195838. The cubic root of 31445252 is about 315.6349065544.

Adding to 31445252 its reverse (25254413), we get a palindrome (56699665).

The spelling of 31445252 in words is "thirty-one million, four hundred forty-five thousand, two hundred fifty-two".