15132690225 has 81 divisors (see below), whose sum is σ = 27771294603. Its totient is φ = 7876896480.

The previous prime is 15132690211. The next prime is 15132690281. The reversal of 15132690225 is 52209623151.

It is a happy number.

The square root of 15132690225 is 123015.

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

It can be written as a sum of positive squares in only one way, i.e., 5447768481 + 9684921744 = 73809^2 + 98412^2 .

It is not a de Polignac number, because 15132690225 - 2²¹ = 15130593073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15132690225.

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, 108868206 + ... + 108868344.

Almost surely, 2^15132690225 is an apocalyptic number.

15132690225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15132690225 is the 123015-th square number.

15132690225 is the 61508-th centered octagonal number.

It is an amenable number.

15132690225 is a deficient number, since it is larger than the sum of its proper divisors (12638604378).

15132690225 is an equidigital number, since it uses as much as digits as its factorization.

15132690225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Multiplying 15132690225 by its sum of digits (36), we get a square (544776848100 = 738090²).

Multiplying 15132690225 by its product of nonzero digits (32400), we get a square (490299163290000 = 22142700²).

The spelling of 15132690225 in words is "fifteen billion, one hundred thirty-two million, six hundred ninety thousand, two hundred twenty-five".