553031561 has 2 divisors, whose sum is σ = 553031562. Its totient is φ = 553031560.

The previous prime is 553031519. The next prime is 553031569. The reversal of 553031561 is 165130355.

553031561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493062025 + 59969536 = 22205^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 553031561 - 2¹⁰ = 553030537 is a prime.

It is not a weakly prime, because it can be changed into another prime (553031569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276515780 + 276515781.

It is an arithmetic number, because the mean of its divisors is an integer number (276515781).

Almost surely, 2^553031561 is an apocalyptic number.

It is an amenable number.

553031561 is a deficient number, since it is larger than the sum of its proper divisors (1).

553031561 is an equidigital number, since it uses as much as digits as its factorization.

553031561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 553031561 is about 23516.6230781547. The cubic root of 553031561 is about 820.8238601659.

The spelling of 553031561 in words is "five hundred fifty-three million, thirty-one thousand, five hundred sixty-one".