53521408 has 22 divisors (see below), whose sum is σ = 106992596. Its totient is φ = 26760192.

The previous prime is 53521393. The next prime is 53521439. The reversal of 53521408 is 80412535.

It is a super-2 number, since 2×53521408² = 5729082228604928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25110 + ... + 27157.

Almost surely, 2^53521408 is an apocalyptic number.

It is an amenable number.

53521408 is a deficient number, since it is larger than the sum of its proper divisors (53471188).

53521408 is an equidigital number, since it uses as much as digits as its factorization.

53521408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52287 (or 52269 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 53521408 is about 7315.8326935490. The cubic root of 53521408 is about 376.8563550626.

The spelling of 53521408 in words is "fifty-three million, five hundred twenty-one thousand, four hundred eight".