52221512 has 32 divisors (see below), whose sum is σ = 114289920. Its totient is φ = 21903360.

The previous prime is 52221509. The next prime is 52221527. The reversal of 52221512 is 21512225.

It is a happy number.

It is a super-2 number, since 2×52221512² = 5454172631132288, which contains 22 as substring.

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, 7289 + ... + 12552.

It is an arithmetic number, because the mean of its divisors is an integer number (3571560).

Almost surely, 2^52221512 is an apocalyptic number.

It is an amenable number.

52221512 is an abundant number, since it is smaller than the sum of its proper divisors (62068408).

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

52221512 is a wasteful number, since it uses less digits than its factorization.

52221512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19901 (or 19897 counting only the distinct ones).

The product of its digits is 400, while the sum is 20.

The square root of 52221512 is about 7226.4453225635. The cubic root of 52221512 is about 373.7803623317.

Adding to 52221512 its reverse (21512225), we get a palindrome (73733737).

The spelling of 52221512 in words is "fifty-two million, two hundred twenty-one thousand, five hundred twelve".