51523620 has 48 divisors (see below), whose sum is σ = 144910080. Its totient is φ = 13678336.

The previous prime is 51523553. The next prime is 51523621. The reversal of 51523620 is 2632515.

It is not an unprimeable number, because it can be changed into a prime (51523621) 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, 12544 + ... + 16136.

It is an arithmetic number, because the mean of its divisors is an integer number (3018960).

Almost surely, 2^51523620 is an apocalyptic number.

It is an amenable number.

51523620 is an abundant number, since it is smaller than the sum of its proper divisors (93386460).

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

51523620 is a wasteful number, since it uses less digits than its factorization.

51523620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844 (or 3842 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51523620 is about 7177.9955419323. The cubic root of 51523620 is about 372.1078135878.

The spelling of 51523620 in words is "fifty-one million, five hundred twenty-three thousand, six hundred twenty".