52257271520 has 96 divisors (see below), whose sum is σ = 127798715520. Its totient is φ = 20168888320.

The previous prime is 52257271501. The next prime is 52257271537. The reversal of 52257271520 is 2517275225.

It is a happy number.

It is a super-2 number, since 2×52257271520² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9987305 + ... + 9992535.

It is an arithmetic number, because the mean of its divisors is an integer number (1331236620).

Almost surely, 2^52257271520 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 52257271520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63899357760).

52257271520 is an abundant number, since it is smaller than the sum of its proper divisors (75541444000).

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

52257271520 is a wasteful number, since it uses less digits than its factorization.

52257271520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428 (or 7420 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 38.

The spelling of 52257271520 in words is "fifty-two billion, two hundred fifty-seven million, two hundred seventy-one thousand, five hundred twenty".