561332273 has 4 divisors (see below), whose sum is σ = 585738048. Its totient is φ = 536926500.

The previous prime is 561332269. The next prime is 561332279. The reversal of 561332273 is 372233165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 372233165 = 5 ⋅74446633.

It is a cyclic number.

It is not a de Polignac number, because 561332273 - 2² = 561332269 is a prime.

It is a super-2 number, since 2×561332273² = 630187841422693058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561332279) 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, 12202853 + ... + 12202898.

It is an arithmetic number, because the mean of its divisors is an integer number (146434512).

Almost surely, 2^561332273 is an apocalyptic number.

It is an amenable number.

561332273 is a deficient number, since it is larger than the sum of its proper divisors (24405775).

561332273 is a wasteful number, since it uses less digits than its factorization.

561332273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24405774.

The product of its digits is 22680, while the sum is 32.

The square root of 561332273 is about 23692.4518148713. The cubic root of 561332273 is about 824.9101943261.

The spelling of 561332273 in words is "five hundred sixty-one million, three hundred thirty-two thousand, two hundred seventy-three".