39221822025 has 99 divisors (see below), whose sum is σ = 73402482279. Its totient is φ = 20789971920.

The previous prime is 39221821993. The next prime is 39221822027. The reversal of 39221822025 is 52022812293.

The square root of 39221822025 is 198045.

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

39221822025 is a `hidden beast` number, since 392 + 21 + 8 + 220 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14119855929 + 25101966096 = 118827^2 + 158436^2 .

It is not a de Polignac number, because 39221822025 - 2⁵ = 39221821993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39221822027) by changing a digit.

It is a polite number, since it can be written in 98 ways as a sum of consecutive naturals, for example, 240624594 + ... + 240624756.

Almost surely, 2^39221822025 is an apocalyptic number.

39221822025 is the 198045-th square number.

39221822025 is the 99023-rd centered octagonal number.

It is an amenable number.

39221822025 is a deficient number, since it is larger than the sum of its proper divisors (34180660254).

39221822025 is an frugal number, since it uses more digits than its factorization.

39221822025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Multiplying 39221822025 by its sum of digits (36), we get a square (1411985592900 = 1188270²).

The spelling of 39221822025 in words is "thirty-nine billion, two hundred twenty-one million, eight hundred twenty-two thousand, twenty-five".