15109572241 has 3 divisors (see below), whose sum is σ = 15109695163. Its totient is φ = 15109449320.

The previous prime is 15109572221. The next prime is 15109572251. The reversal of 15109572241 is 14227590151.

The square root of 15109572241 is 122921.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1147786641 + 13961785600 = 33879^2 + 118160^2 .

It is not a de Polignac number, because 15109572241 - 2¹³ = 15109564049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15109572241.

It is not an unprimeable number, because it can be changed into a prime (15109572221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 61461 + ... + 184381.

Almost surely, 2^15109572241 is an apocalyptic number.

15109572241 is the 122921-st square number.

15109572241 is the 61461-st centered octagonal number.

It is an amenable number.

15109572241 is a deficient number, since it is larger than the sum of its proper divisors (122922).

15109572241 is an frugal number, since it uses more digits than its factorization.

15109572241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245842 (or 122921 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 15109572241 in words is "fifteen billion, one hundred nine million, five hundred seventy-two thousand, two hundred forty-one".