158216995225 has 81 divisors (see below), whose sum is σ = 213743938653. Its totient is φ = 116160108480.

The previous prime is 158216995217. The next prime is 158216995231. The reversal of 158216995225 is 522599612851.

The square root of 158216995225 is 397765.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1191837529 + 157025157696 = 34523^2 + 396264^2 .

It is not a de Polignac number, because 158216995225 - 2³ = 158216995217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2002746736 + ... + 2002746814.

Almost surely, 2^158216995225 is an apocalyptic number.

158216995225 is the 397765-th square number.

158216995225 is the 198883-rd centered octagonal number.

It is an amenable number.

158216995225 is a deficient number, since it is larger than the sum of its proper divisors (55526943428).

158216995225 is an frugal number, since it uses more digits than its factorization.

158216995225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 156 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 55.

The spelling of 158216995225 in words is "one hundred fifty-eight billion, two hundred sixteen million, nine hundred ninety-five thousand, two hundred twenty-five".