53202021 has 4 divisors (see below), whose sum is σ = 70936032. Its totient is φ = 35468012.

The previous prime is 53201999. The next prime is 53202029. The reversal of 53202021 is 12020235.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53202021 - 2⁵ = 53201989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53202029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8867001 + ... + 8867006.

It is an arithmetic number, because the mean of its divisors is an integer number (17734008).

Almost surely, 2^53202021 is an apocalyptic number.

It is an amenable number.

53202021 is a deficient number, since it is larger than the sum of its proper divisors (17734011).

53202021 is a wasteful number, since it uses less digits than its factorization.

53202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17734010.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 53202021 is about 7293.9715519050. The cubic root of 53202021 is about 376.1052335786.

Adding to 53202021 its reverse (12020235), we get a palindrome (65222256).

The spelling of 53202021 in words is "fifty-three million, two hundred two thousand, twenty-one".