250166161 has 4 divisors (see below), whose sum is σ = 285904192. Its totient is φ = 214428132.

The previous prime is 250166153. The next prime is 250166171. The reversal of 250166161 is 161661052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 250166161 - 2³ = 250166153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (250166171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17869005 + ... + 17869018.

It is an arithmetic number, because the mean of its divisors is an integer number (71476048).

Almost surely, 2^250166161 is an apocalyptic number.

It is an amenable number.

250166161 is a deficient number, since it is larger than the sum of its proper divisors (35738031).

250166161 is an equidigital number, since it uses as much as digits as its factorization.

250166161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35738030.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 250166161 is about 15816.6419002265. The cubic root of 250166161 is about 630.1000605326.

The spelling of 250166161 in words is "two hundred fifty million, one hundred sixty-six thousand, one hundred sixty-one".