561134557 has 2 divisors, whose sum is σ = 561134558. Its totient is φ = 561134556.

The previous prime is 561134533. The next prime is 561134647. The reversal of 561134557 is 755431165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423166041 + 137968516 = 20571^2 + 11746^2 .

It is a cyclic number.

It is not a de Polignac number, because 561134557 - 2¹⁵ = 561101789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561134527) 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 as a sum of consecutive naturals, namely, 280567278 + 280567279.

It is an arithmetic number, because the mean of its divisors is an integer number (280567279).

Almost surely, 2^561134557 is an apocalyptic number.

It is an amenable number.

561134557 is a deficient number, since it is larger than the sum of its proper divisors (1).

561134557 is an equidigital number, since it uses as much as digits as its factorization.

561134557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 37.

The square root of 561134557 is about 23688.2788948459. The cubic root of 561134557 is about 824.8133312591.

The spelling of 561134557 in words is "five hundred sixty-one million, one hundred thirty-four thousand, five hundred fifty-seven".