561775331 has 4 divisors (see below), whose sum is σ = 604988832. Its totient is φ = 518561832.

The previous prime is 561775321. The next prime is 561775339. The reversal of 561775331 is 133577165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133577165 = 5 ⋅26715433.

It is a cyclic number.

It is not a de Polignac number, because 561775331 - 2⁶ = 561775267 is a prime.

It is a super-2 number, since 2×561775331² = 631183045040319122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561775339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21606731 + ... + 21606756.

It is an arithmetic number, because the mean of its divisors is an integer number (151247208).

Almost surely, 2^561775331 is an apocalyptic number.

561775331 is a deficient number, since it is larger than the sum of its proper divisors (43213501).

561775331 is a wasteful number, since it uses less digits than its factorization.

561775331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43213500.

The product of its digits is 66150, while the sum is 38.

The square root of 561775331 is about 23701.8001637006. The cubic root of 561775331 is about 825.1271703564.

The spelling of 561775331 in words is "five hundred sixty-one million, seven hundred seventy-five thousand, three hundred thirty-one".