52321620 has 48 divisors (see below), whose sum is σ = 157772160. Its totient is φ = 12878976.

The previous prime is 52321571. The next prime is 52321627. The reversal of 52321620 is 2612325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52321627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32760 + ... + 34319.

It is an arithmetic number, because the mean of its divisors is an integer number (3286920).

Almost surely, 2^52321620 is an apocalyptic number.

It is an amenable number.

52321620 is an abundant number, since it is smaller than the sum of its proper divisors (105450540).

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

52321620 is a wasteful number, since it uses less digits than its factorization.

52321620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67104 (or 67102 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 52321620 is about 7233.3685098991. The cubic root of 52321620 is about 374.0190540017.

Adding to 52321620 its reverse (2612325), we get a palindrome (54933945).

The spelling of 52321620 in words is "fifty-two million, three hundred twenty-one thousand, six hundred twenty".