52621520 has 40 divisors (see below), whose sum is σ = 139824384. Its totient is φ = 18041472.

The previous prime is 52621487. The next prime is 52621523. The reversal of 52621520 is 2512625.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×52621520² = 5538048734220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621523) 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, 46424 + ... + 47543.

Almost surely, 2^52621520 is an apocalyptic number.

It is an amenable number.

52621520 is an abundant number, since it is smaller than the sum of its proper divisors (87202864).

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

52621520 is a wasteful number, since it uses less digits than its factorization.

52621520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93987 (or 93981 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 52621520 is about 7254.0692028681. The cubic root of 52621520 is about 374.7323007964.

The spelling of 52621520 in words is "fifty-two million, six hundred twenty-one thousand, five hundred twenty".