53521524 has 54 divisors (see below), whose sum is σ = 157383954. Its totient is φ = 15291360.

The previous prime is 53521511. The next prime is 53521547. The reversal of 53521524 is 42512535.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 37601424 + 15920100 = 6132^2 + 3990^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13407 + ... + 16934.

Almost surely, 2^53521524 is an apocalyptic number.

It is an amenable number.

53521524 is an abundant number, since it is smaller than the sum of its proper divisors (103862430).

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

53521524 is a wasteful number, since it uses less digits than its factorization.

53521524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30365 (or 30353 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 53521524 is about 7315.8406215554. The cubic root of 53521524 is about 376.8566273231.

It can be divided in two parts, 53521 and 524, that added together give a palindrome (54045).

The spelling of 53521524 in words is "fifty-three million, five hundred twenty-one thousand, five hundred twenty-four".