53222720 has 56 divisors (see below), whose sum is σ = 128930400. Its totient is φ = 20920832.

The previous prime is 53222717. The next prime is 53222731. The reversal of 53222720 is 2722235.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17471 + ... + 20289.

Almost surely, 2^53222720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64465200).

53222720 is an abundant number, since it is smaller than the sum of its proper divisors (75707680).

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

53222720 is a wasteful number, since it uses less digits than its factorization.

53222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2895 (or 2885 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 53222720 is about 7295.3903254041. The cubic root of 53222720 is about 376.1540036108.

Adding to 53222720 its reverse (2722235), we get a palindrome (55944955).

The spelling of 53222720 in words is "fifty-three million, two hundred twenty-two thousand, seven hundred twenty".