170641231 has 2 divisors, whose sum is σ = 170641232. Its totient is φ = 170641230.

The previous prime is 170641199. The next prime is 170641253. The reversal of 170641231 is 132146071.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 170641231 - 2⁵ = 170641199 is a prime.

It is a super-2 number, since 2×170641231² = 58236859434390722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 170641196 and 170641205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170641271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85320615 + 85320616.

It is an arithmetic number, because the mean of its divisors is an integer number (85320616).

Almost surely, 2^170641231 is an apocalyptic number.

170641231 is a deficient number, since it is larger than the sum of its proper divisors (1).

170641231 is an equidigital number, since it uses as much as digits as its factorization.

170641231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 170641231 is about 13062.9717522469. The cubic root of 170641231 is about 554.6614616954.

The spelling of 170641231 in words is "one hundred seventy million, six hundred forty-one thousand, two hundred thirty-one".