53222520 has 128 divisors (see below), whose sum is σ = 174081600. Its totient is φ = 12939264.

The previous prime is 53222509. The next prime is 53222527. The reversal of 53222520 is 2522235.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53222527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169884 + ... + 170196.

Almost surely, 2^53222520 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 53222520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87040800).

53222520 is an abundant number, since it is smaller than the sum of its proper divisors (120859080).

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

53222520 is a wasteful number, since it uses less digits than its factorization.

53222520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 445 counting only the distinct ones).

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

The square root of 53222520 is about 7295.3766181055. The cubic root of 53222520 is about 376.1535324405.

Adding to 53222520 its reverse (2522235), we get a palindrome (55744755).

The spelling of 53222520 in words is "fifty-three million, two hundred twenty-two thousand, five hundred twenty".