250165261 has 2 divisors, whose sum is σ = 250165262. Its totient is φ = 250165260.

The previous prime is 250165219. The next prime is 250165277. The reversal of 250165261 is 162561052.

250165261 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., 249798025 + 367236 = 15805^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 250165261 - 2⁹ = 250164749 is a prime.

It is a super-2 number, since 2×250165261² = 125165315622396242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250165211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125082630 + 125082631.

It is an arithmetic number, because the mean of its divisors is an integer number (125082631).

Almost surely, 2^250165261 is an apocalyptic number.

It is an amenable number.

250165261 is a deficient number, since it is larger than the sum of its proper divisors (1).

250165261 is an equidigital number, since it uses as much as digits as its factorization.

250165261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 250165261 is about 15816.6134491553. The cubic root of 250165261 is about 630.0993049138.

The spelling of 250165261 in words is "two hundred fifty million, one hundred sixty-five thousand, two hundred sixty-one".