561544351 has 4 divisors (see below), whose sum is σ = 561688704. Its totient is φ = 561400000.

The previous prime is 561544339. The next prime is 561544441. The reversal of 561544351 is 153445165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561544351 - 2⁹ = 561543839 is a prime.

It is a super-2 number, since 2×561544351² = 630664116280022402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561544331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66175 + ... + 74176.

It is an arithmetic number, because the mean of its divisors is an integer number (140422176).

Almost surely, 2^561544351 is an apocalyptic number.

561544351 is a deficient number, since it is larger than the sum of its proper divisors (144353).

561544351 is a wasteful number, since it uses less digits than its factorization.

561544351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144352.

The product of its digits is 36000, while the sum is 34.

The square root of 561544351 is about 23696.9270370654. The cubic root of 561544351 is about 825.0140682021.

The spelling of 561544351 in words is "five hundred sixty-one million, five hundred forty-four thousand, three hundred fifty-one".