15194260225 has 27 divisors (see below), whose sum is σ = 19123995387. Its totient is φ = 11975441280.

The previous prime is 15194260219. The next prime is 15194260229. The reversal of 15194260225 is 52206249151.

The square root of 15194260225 is 123265.

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

It can be written as a sum of positive squares in 13 ways, for example, as 15162720769 + 31539456 = 123137^2 + 5616^2 .

It is not a de Polignac number, because 15194260225 - 2⁹ = 15194259713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15194260229) 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, 54852787 + ... + 54853063.

Almost surely, 2^15194260225 is an apocalyptic number.

15194260225 is the 123265-th square number.

15194260225 is the 61633-rd centered octagonal number.

It is an amenable number.

15194260225 is a deficient number, since it is larger than the sum of its proper divisors (3929735162).

15194260225 is an frugal number, since it uses more digits than its factorization.

15194260225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 15194260225 in words is "fifteen billion, one hundred ninety-four million, two hundred sixty thousand, two hundred twenty-five".