53220504 has 64 divisors (see below), whose sum is σ = 138687840. Its totient is φ = 17003520.

The previous prime is 53220499. The next prime is 53220553. The reversal of 53220504 is 40502235.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64414 + ... + 65234.

Almost surely, 2^53220504 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 53220504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69343920).

53220504 is an abundant number, since it is smaller than the sum of its proper divisors (85467336).

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

53220504 is a wasteful number, since it uses less digits than its factorization.

53220504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 53220504 is about 7295.2384470968. The cubic root of 53220504 is about 376.1487829780.

Adding to 53220504 its reverse (40502235), we get a palindrome (93722739).

The spelling of 53220504 in words is "fifty-three million, two hundred twenty thousand, five hundred four".