102166231 has 4 divisors (see below), whose sum is σ = 103605264. Its totient is φ = 100727200.

The previous prime is 102166199. The next prime is 102166271. The reversal of 102166231 is 132661201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132661201 = 151 ⋅878551.

It is a cyclic number.

It is not a de Polignac number, because 102166231 - 2⁵ = 102166199 is a prime.

It is a super-2 number, since 2×102166231² = 20875877513490722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102166271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719410 + ... + 719551.

It is an arithmetic number, because the mean of its divisors is an integer number (25901316).

Almost surely, 2^102166231 is an apocalyptic number.

102166231 is a deficient number, since it is larger than the sum of its proper divisors (1439033).

102166231 is an equidigital number, since it uses as much as digits as its factorization.

102166231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439032.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 102166231 is about 10107.7312489005. The cubic root of 102166231 is about 467.4865539900.

The spelling of 102166231 in words is "one hundred two million, one hundred sixty-six thousand, two hundred thirty-one".