53249520 has 40 divisors (see below), whose sum is σ = 165074256. Its totient is φ = 14199808.

The previous prime is 53249519. The next prime is 53249557. The reversal of 53249520 is 2594235.

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

It is a super-2 number, since 2×53249520² = 5671022760460800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 110697 + ... + 111176.

Almost surely, 2^53249520 is an apocalyptic number.

It is an amenable number.

53249520 is an abundant number, since it is smaller than the sum of its proper divisors (111824736).

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

53249520 is a wasteful number, since it uses less digits than its factorization.

53249520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221889 (or 221883 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 53249520 is about 7297.2268705310. The cubic root of 53249520 is about 376.2171297576.

The spelling of 53249520 in words is "fifty-three million, two hundred forty-nine thousand, five hundred twenty".