52070219721 has 27 divisors (see below), whose sum is σ = 81457086087. Its totient is φ = 32037735600.

The previous prime is 52070219711. The next prime is 52070219759. The reversal of 52070219721 is 12791207025.

The square root of 52070219721 is 228189.

It is a perfect power (a square), and thus also a powerful number.

52070219721 is a `hidden beast` number, since 520 + 7 + 0 + 21 + 97 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7702695225 + 44367524496 = 87765^2 + 210636^2 .

It is not a de Polignac number, because 52070219721 - 2¹¹ = 52070217673 is a prime.

It is a super-2 number, since 2×52070219721² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52070219711) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8896446 + ... + 8902296.

Almost surely, 2^52070219721 is an apocalyptic number.

52070219721 is the 228189-th square number.

52070219721 is the 114095-th centered octagonal number.

It is an amenable number.

52070219721 is a deficient number, since it is larger than the sum of its proper divisors (29386866366).

52070219721 is an frugal number, since it uses more digits than its factorization.

52070219721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11734 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

Multiplying 52070219721 by its sum of digits (36), we get a square (1874527909956 = 1369134²).

The spelling of 52070219721 in words is "fifty-two billion, seventy million, two hundred nineteen thousand, seven hundred twenty-one".