53391488 has 32 divisors (see below), whose sum is σ = 106717500. Its totient is φ = 26607616.

The previous prime is 53391479. The next prime is 53391491. The reversal of 53391488 is 88419335.

It can be written as a sum of positive squares in 2 ways, for example, as 49674304 + 3717184 = 7048^2 + 1928^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57008 + ... + 57936.

Almost surely, 2^53391488 is an apocalyptic number.

It is an amenable number.

53391488 is a deficient number, since it is larger than the sum of its proper divisors (53326012).

53391488 is an equidigital number, since it uses as much as digits as its factorization.

53391488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1380 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 53391488 is about 7306.9479264601. The cubic root of 53391488 is about 376.5511759466.

The spelling of 53391488 in words is "fifty-three million, three hundred ninety-one thousand, four hundred eighty-eight".