53240724 has 18 divisors (see below), whose sum is σ = 134580810. Its totient is φ = 17746896.

The previous prime is 53240713. The next prime is 53240731. The reversal of 53240724 is 42704235.

It can be written as a sum of positive squares in only one way, i.e., 39312900 + 13927824 = 6270^2 + 3732^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 739419 + ... + 739490.

Almost surely, 2^53240724 is an apocalyptic number.

It is an amenable number.

53240724 is an abundant number, since it is smaller than the sum of its proper divisors (81340086).

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

53240724 is a wasteful number, since it uses less digits than its factorization.

53240724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478919 (or 1478914 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 53240724 is about 7296.6241509345. The cubic root of 53240724 is about 376.1964135264.

Adding to 53240724 its reverse (42704235), we get a palindrome (95944959).

The spelling of 53240724 in words is "fifty-three million, two hundred forty thousand, seven hundred twenty-four".