53231820 has 48 divisors (see below), whose sum is σ = 154193760. Its totient is φ = 13705216.

The previous prime is 53231771. The next prime is 53231861. The reversal of 53231820 is 2813235.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13557 + ... + 17036.

It is an arithmetic number, because the mean of its divisors is an integer number (3212370).

Almost surely, 2^53231820 is an apocalyptic number.

It is an amenable number.

53231820 is an abundant number, since it is smaller than the sum of its proper divisors (100961940).

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

53231820 is a wasteful number, since it uses less digits than its factorization.

53231820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30634 (or 30632 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 53231820 is about 7296.0139802498. The cubic root of 53231820 is about 376.1754406109.

The spelling of 53231820 in words is "fifty-three million, two hundred thirty-one thousand, eight hundred twenty".