561055519 has 2 divisors, whose sum is σ = 561055520. Its totient is φ = 561055518.

The previous prime is 561055499. The next prime is 561055549. The reversal of 561055519 is 915550165.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561055519 - 2⁵ = 561055487 is a prime.

It is a super-2 number, since 2×561055519² = 629566590800718722, which contains 22 as substring.

It is equal to p_29394523 and since 561055519 and 29394523 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561055549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280527759 + 280527760.

It is an arithmetic number, because the mean of its divisors is an integer number (280527760).

Almost surely, 2^561055519 is an apocalyptic number.

561055519 is a deficient number, since it is larger than the sum of its proper divisors (1).

561055519 is an equidigital number, since it uses as much as digits as its factorization.

561055519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33750, while the sum is 37.

The square root of 561055519 is about 23686.6105426673. The cubic root of 561055519 is about 824.7746033780.

The spelling of 561055519 in words is "five hundred sixty-one million, fifty-five thousand, five hundred nineteen".