561995519 has 2 divisors, whose sum is σ = 561995520. Its totient is φ = 561995518.

The previous prime is 561995513. The next prime is 561995543. The reversal of 561995519 is 915599165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561995519 is a prime.

It is a super-2 number, since 2×561995519² = 631677926752158722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561995513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280997759 + 280997760.

It is an arithmetic number, because the mean of its divisors is an integer number (280997760).

Almost surely, 2^561995519 is an apocalyptic number.

561995519 is a deficient number, since it is larger than the sum of its proper divisors (1).

561995519 is an equidigital number, since it uses as much as digits as its factorization.

561995519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 546750, while the sum is 50.

The square root of 561995519 is about 23706.4446722827. Note that the first 3 decimals coincide. The cubic root of 561995519 is about 825.2349592177.

The spelling of 561995519 in words is "five hundred sixty-one million, nine hundred ninety-five thousand, five hundred nineteen".