53023521 has 8 divisors (see below), whose sum is σ = 71214624. Its totient is φ = 35090720.

The previous prime is 53023483. The next prime is 53023541. The reversal of 53023521 is 12532035.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53023521 - 2⁷ = 53023393 is a prime.

It is a super-2 number, since 2×53023521² = 5622987558474882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53023541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64095 + ... + 64916.

It is an arithmetic number, because the mean of its divisors is an integer number (8901828).

Almost surely, 2^53023521 is an apocalyptic number.

It is an amenable number.

53023521 is a deficient number, since it is larger than the sum of its proper divisors (18191103).

53023521 is a wasteful number, since it uses less digits than its factorization.

53023521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129151.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 53023521 is about 7281.7251390038. The cubic root of 53023521 is about 375.6841342463.

Adding to 53023521 its reverse (12532035), we get a palindrome (65555556).

The spelling of 53023521 in words is "fifty-three million, twenty-three thousand, five hundred twenty-one".