1513250561 has 4 divisors (see below), whose sum is σ = 1524802224. Its totient is φ = 1501698900.

The previous prime is 1513250533. The next prime is 1513250581. The reversal of 1513250561 is 1650523151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1513250561 - 2¹⁸ = 1512988417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1513250521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5775635 + ... + 5775896.

It is an arithmetic number, because the mean of its divisors is an integer number (381200556).

Almost surely, 2^1513250561 is an apocalyptic number.

It is an amenable number.

1513250561 is a deficient number, since it is larger than the sum of its proper divisors (11551663).

1513250561 is a wasteful number, since it uses less digits than its factorization.

1513250561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11551662.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1513250561 is about 38900.5213461208. The cubic root of 1513250561 is about 1148.0750559470.

The spelling of 1513250561 in words is "one billion, five hundred thirteen million, two hundred fifty thousand, five hundred sixty-one".