431311231 has 8 divisors (see below), whose sum is σ = 465030944. Its totient is φ = 397668960.

The previous prime is 431311159. The next prime is 431311259. The reversal of 431311231 is 132113134.

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

It is not a de Polignac number, because 431311231 - 2²³ = 422922623 is a prime.

It is a super-2 number, since 2×431311231² = 372058755973470722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431311199 and 431311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431311831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7515 + ... + 30316.

It is an arithmetic number, because the mean of its divisors is an integer number (58128868).

Almost surely, 2^431311231 is an apocalyptic number.

431311231 is a deficient number, since it is larger than the sum of its proper divisors (33719713).

431311231 is a wasteful number, since it uses less digits than its factorization.

431311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38721.

The product of its digits is 216, while the sum is 19.

The square root of 431311231 is about 20768.0338742020. The cubic root of 431311231 is about 755.5506594895.

Adding to 431311231 its reverse (132113134), we get a palindrome (563424365).

The spelling of 431311231 in words is "four hundred thirty-one million, three hundred eleven thousand, two hundred thirty-one".