53013621 has 8 divisors (see below), whose sum is σ = 72018720. Its totient is φ = 34675472.

The previous prime is 53013613. The next prime is 53013659. The reversal of 53013621 is 12631035.

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 53013621 - 2³ = 53013613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53013671) 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, 166551 + ... + 166868.

It is an arithmetic number, because the mean of its divisors is an integer number (9002340).

Almost surely, 2^53013621 is an apocalyptic number.

It is an amenable number.

53013621 is a deficient number, since it is larger than the sum of its proper divisors (19005099).

53013621 is a wasteful number, since it uses less digits than its factorization.

53013621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333475.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 53013621 is about 7281.0453233035. The cubic root of 53013621 is about 375.6607515138.

Adding to 53013621 its reverse (12631035), we get a palindrome (65644656).

The spelling of 53013621 in words is "fifty-three million, thirteen thousand, six hundred twenty-one".