431666159 has 4 divisors (see below), whose sum is σ = 457058304. Its totient is φ = 406274016.

The previous prime is 431666143. The next prime is 431666167. The reversal of 431666159 is 951666134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951666134 = 2 ⋅475833067.

It is a cyclic number.

It is not a de Polignac number, because 431666159 - 2⁴ = 431666143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431666359) 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, 12696047 + ... + 12696080.

It is an arithmetic number, because the mean of its divisors is an integer number (114264576).

Almost surely, 2^431666159 is an apocalyptic number.

431666159 is a deficient number, since it is larger than the sum of its proper divisors (25392145).

431666159 is a wasteful number, since it uses less digits than its factorization.

431666159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25392144.

The product of its digits is 116640, while the sum is 41.

The square root of 431666159 is about 20776.5771723833. The cubic root of 431666159 is about 755.7578513735.

The spelling of 431666159 in words is "four hundred thirty-one million, six hundred sixty-six thousand, one hundred fifty-nine".