53137440 has 72 divisors (see below), whose sum is σ = 181336428. Its totient is φ = 14169600.

The previous prime is 53137421. The next prime is 53137457. The reversal of 53137440 is 4473135.

It can be written as a sum of positive squares in 2 ways, for example, as 45319824 + 7817616 = 6732^2 + 2796^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17011 + ... + 19890.

Almost surely, 2^53137440 is an apocalyptic number.

It is an amenable number.

53137440 is an abundant number, since it is smaller than the sum of its proper divisors (128198988).

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

53137440 is a wasteful number, since it uses less digits than its factorization.

53137440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36922 (or 36911 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 53137440 is about 7289.5431955645. The cubic root of 53137440 is about 375.9529894448.

The spelling of 53137440 in words is "fifty-three million, one hundred thirty-seven thousand, four hundred forty".