431166 has 8 divisors (see below), whose sum is σ = 862344. Its totient is φ = 143720.

The previous prime is 431153. The next prime is 431173. The reversal of 431166 is 661134.

It is a sphenic number, since it is the product of 3 distinct primes.

431166 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

431166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35925 + ... + 35936.

It is an arithmetic number, because the mean of its divisors is an integer number (107793).

2⁴³¹¹⁶⁶ is an apocalyptic number.

431166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431166 is a wasteful number, since it uses less digits than its factorization.

431166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71866.

The product of its digits is 432, while the sum is 21.

The square root of 431166 is about 656.6323172065. The cubic root of 431166 is about 75.5465847032.

The spelling of 431166 in words is "four hundred thirty-one thousand, one hundred sixty-six".