231202171 has 2 divisors, whose sum is σ = 231202172. Its totient is φ = 231202170.

The previous prime is 231202121. The next prime is 231202177. The reversal of 231202171 is 171202132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231202171 - 2²⁵ = 197647739 is a prime.

It is a super-2 number, since 2×231202171² = 106908887750226482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231202177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115601085 + 115601086.

It is an arithmetic number, because the mean of its divisors is an integer number (115601086).

Almost surely, 2^231202171 is an apocalyptic number.

231202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

231202171 is an equidigital number, since it uses as much as digits as its factorization.

231202171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 231202171 is about 15205.3336365895. Note that the first 3 decimals coincide. The cubic root of 231202171 is about 613.7581931120.

The spelling of 231202171 in words is "two hundred thirty-one million, two hundred two thousand, one hundred seventy-one".