561553131 has 8 divisors (see below), whose sum is σ = 750123664. Its totient is φ = 373675680.

The previous prime is 561553121. The next prime is 561553147. The reversal of 561553131 is 131355165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561553131 - 2¹¹ = 561551083 is a prime.

It is a super-2 number, since 2×561553131² = 630683837871806322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561553121) 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 7 ways as a sum of consecutive naturals, for example, 171376 + ... + 174621.

It is an arithmetic number, because the mean of its divisors is an integer number (93765458).

Almost surely, 2^561553131 is an apocalyptic number.

561553131 is a deficient number, since it is larger than the sum of its proper divisors (188570533).

561553131 is a wasteful number, since it uses less digits than its factorization.

561553131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346541.

The product of its digits is 6750, while the sum is 30.

The square root of 561553131 is about 23697.1122924292. The cubic root of 561553131 is about 825.0183680024.

The spelling of 561553131 in words is "five hundred sixty-one million, five hundred fifty-three thousand, one hundred thirty-one".