31820052 has 24 divisors (see below), whose sum is σ = 80996832. Its totient is φ = 9642400.

The previous prime is 31820051. The next prime is 31820069. The reversal of 31820052 is 25002813.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31820051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120399 + ... + 120662.

It is an arithmetic number, because the mean of its divisors is an integer number (3374868).

Almost surely, 2^31820052 is an apocalyptic number.

It is an amenable number.

31820052 is an abundant number, since it is smaller than the sum of its proper divisors (49176780).

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

31820052 is a wasteful number, since it uses less digits than its factorization.

31820052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241079 (or 241077 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 31820052 is about 5640.9265196420. The cubic root of 31820052 is about 316.8839879730.

Adding to 31820052 its reverse (25002813), we get a palindrome (56822865).

The spelling of 31820052 in words is "thirty-one million, eight hundred twenty thousand, fifty-two".