53572221 has 12 divisors (see below), whose sum is σ = 80746848. Its totient is φ = 34161864.

The previous prime is 53572217. The next prime is 53572231. The reversal of 53572221 is 12227535.

It is not a de Polignac number, because 53572221 - 2² = 53572217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53572231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129195 + ... + 129608.

It is an arithmetic number, because the mean of its divisors is an integer number (6728904).

Almost surely, 2^53572221 is an apocalyptic number.

It is an amenable number.

53572221 is a deficient number, since it is larger than the sum of its proper divisors (27174627).

53572221 is a wasteful number, since it uses less digits than its factorization.

53572221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258832 (or 258829 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 53572221 is about 7319.3046800909. The cubic root of 53572221 is about 376.9755792872.

Adding to 53572221 its reverse (12227535), we get a palindrome (65799756).

The spelling of 53572221 in words is "fifty-three million, five hundred seventy-two thousand, two hundred twenty-one".