2515323409 has 3 divisors (see below), whose sum is σ = 2515373563. Its totient is φ = 2515273256.

The previous prime is 2515323361. The next prime is 2515323431. The reversal of 2515323409 is 9043235152.

The square root of 2515323409 is 50153.

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., 1323140625 + 1192182784 = 36375^2 + 34528^2 .

It is not a de Polignac number, because 2515323409 - 2⁹ = 2515322897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2515323469) 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, 25077 + ... + 75229.

Almost surely, 2^2515323409 is an apocalyptic number.

2515323409 is the 50153-rd square number.

2515323409 is the 25077-th centered octagonal number.

It is an amenable number.

2515323409 is a deficient number, since it is larger than the sum of its proper divisors (50154).

2515323409 is an frugal number, since it uses more digits than its factorization.

2515323409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100306 (or 50153 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The cubic root of 2515323409 is about 1359.9761041433.

Multiplying 2515323409 by its product of nonzero digits (32400), we get a square (81496478451600 = 9027540²).

The spelling of 2515323409 in words is "two billion, five hundred fifteen million, three hundred twenty-three thousand, four hundred nine".