561846281 has 4 divisors (see below), whose sum is σ = 561893700. Its totient is φ = 561798864.

The previous prime is 561846251. The next prime is 561846289. The reversal of 561846281 is 182648165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 171191056 + 390655225 = 13084^2 + 19765^2 .

It is a cyclic number.

It is not a de Polignac number, because 561846281 - 2²² = 557651977 is a prime.

It is a super-2 number, since 2×561846281² = 631342486947061922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561846289) 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, 11075 + ... + 35303.

It is an arithmetic number, because the mean of its divisors is an integer number (140473425).

Almost surely, 2^561846281 is an apocalyptic number.

It is an amenable number.

561846281 is a deficient number, since it is larger than the sum of its proper divisors (47419).

561846281 is a wasteful number, since it uses less digits than its factorization.

561846281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47418.

The product of its digits is 92160, while the sum is 41.

The square root of 561846281 is about 23703.2968382038. The cubic root of 561846281 is about 825.1619056590.

The spelling of 561846281 in words is "five hundred sixty-one million, eight hundred forty-six thousand, two hundred eighty-one".