561545351 has 4 divisors (see below), whose sum is σ = 568653600. Its totient is φ = 554437104.

The previous prime is 561545339. The next prime is 561545401. The reversal of 561545351 is 153545165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 153545165 = 5 ⋅30709033.

It is a cyclic number.

It is not a de Polignac number, because 561545351 - 2¹⁰ = 561544327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561545311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3554006 + ... + 3554163.

It is an arithmetic number, because the mean of its divisors is an integer number (142163400).

Almost surely, 2^561545351 is an apocalyptic number.

561545351 is a deficient number, since it is larger than the sum of its proper divisors (7108249).

561545351 is an equidigital number, since it uses as much as digits as its factorization.

561545351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108248.

The product of its digits is 45000, while the sum is 35.

The square root of 561545351 is about 23696.9481368382. The cubic root of 561545351 is about 825.0145579310.

The spelling of 561545351 in words is "five hundred sixty-one million, five hundred forty-five thousand, three hundred fifty-one".