561298513 has 4 divisors (see below), whose sum is σ = 590840560. Its totient is φ = 531756468.

The previous prime is 561298457. The next prime is 561298519. The reversal of 561298513 is 315892165.

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 561298513 - 2²¹ = 559201361 is a prime.

It is a super-2 number, since 2×561298513² = 630112041392022338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561298519) 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, 14770995 + ... + 14771032.

It is an arithmetic number, because the mean of its divisors is an integer number (147710140).

Almost surely, 2^561298513 is an apocalyptic number.

It is an amenable number.

561298513 is a deficient number, since it is larger than the sum of its proper divisors (29542047).

561298513 is a wasteful number, since it uses less digits than its factorization.

561298513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29542046.

The product of its digits is 64800, while the sum is 40.

The square root of 561298513 is about 23691.7393409602. The cubic root of 561298513 is about 824.8936565713.

The spelling of 561298513 in words is "five hundred sixty-one million, two hundred ninety-eight thousand, five hundred thirteen".