250556161 has 2 divisors, whose sum is σ = 250556162. Its totient is φ = 250556160.

The previous prime is 250556147. The next prime is 250556197. The reversal of 250556161 is 161655052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 119224561 = 11460^2 + 10919^2 .

It is a cyclic number.

It is not a de Polignac number, because 250556161 - 2⁵ = 250556129 is a prime.

It is not a weakly prime, because it can be changed into another prime (250556101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125278080 + 125278081.

It is an arithmetic number, because the mean of its divisors is an integer number (125278081).

Almost surely, 2^250556161 is an apocalyptic number.

It is an amenable number.

250556161 is a deficient number, since it is larger than the sum of its proper divisors (1).

250556161 is an equidigital number, since it uses as much as digits as its factorization.

250556161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 250556161 is about 15828.9658853635. The cubic root of 250556161 is about 630.4273249311.

The spelling of 250556161 in words is "two hundred fifty million, five hundred fifty-six thousand, one hundred sixty-one".