15223858225 has 9 divisors (see below), whose sum is σ = 18878349217. Its totient is φ = 12178593040.

The previous prime is 15223858213. The next prime is 15223858249. The reversal of 15223858225 is 52285832251.

The square root of 15223858225 is 123385.

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 904385329 + 14319472896 = 30073^2 + 119664^2 .

It is not a de Polignac number, because 15223858225 - 2¹⁵ = 15223825457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 604587 + ... + 629263.

Almost surely, 2^15223858225 is an apocalyptic number.

15223858225 is the 123385-th square number.

15223858225 is the 61693-rd centered octagonal number.

It is an amenable number.

15223858225 is a deficient number, since it is larger than the sum of its proper divisors (3654490992).

15223858225 is an frugal number, since it uses more digits than its factorization.

15223858225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49364 (or 24682 counting only the distinct ones).

The product of its digits is 384000, while the sum is 43.

The spelling of 15223858225 in words is "fifteen billion, two hundred twenty-three million, eight hundred fifty-eight thousand, two hundred twenty-five".