52491520 has 72 divisors (see below), whose sum is σ = 131273856. Its totient is φ = 20072448.

The previous prime is 52491511. The next prime is 52491541. The reversal of 52491520 is 2519425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28549 + ... + 30331.

It is an arithmetic number, because the mean of its divisors is an integer number (1823248).

Almost surely, 2^52491520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65636928).

52491520 is an abundant number, since it is smaller than the sum of its proper divisors (78782336).

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

52491520 is a wasteful number, since it uses less digits than its factorization.

52491520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827 (or 1813 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 52491520 is about 7245.1031738685. The cubic root of 52491520 is about 374.4234577554.

The spelling of 52491520 in words is "fifty-two million, four hundred ninety-one thousand, five hundred twenty".