52221756 has 24 divisors (see below), whose sum is σ = 129018960. Its totient is φ = 16383232.

The previous prime is 52221751. The next prime is 52221769. The reversal of 52221756 is 65712225.

It is a super-2 number, since 2×52221756² = 5454223599447072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52221751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127791 + ... + 128198.

It is an arithmetic number, because the mean of its divisors is an integer number (5375790).

Almost surely, 2^52221756 is an apocalyptic number.

It is an amenable number.

52221756 is an abundant number, since it is smaller than the sum of its proper divisors (76797204).

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

52221756 is a wasteful number, since it uses less digits than its factorization.

52221756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256013 (or 256011 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 52221756 is about 7226.4622049797. The cubic root of 52221756 is about 373.7809444817.

The spelling of 52221756 in words is "fifty-two million, two hundred twenty-one thousand, seven hundred fifty-six".