431312399 has 16 divisors (see below), whose sum is σ = 519187968. Its totient is φ = 350303712.

The previous prime is 431312383. The next prime is 431312417. The reversal of 431312399 is 993213134.

It is a cyclic number.

It is not a de Polignac number, because 431312399 - 2⁴ = 431312383 is a prime.

It is a super-2 number, since 2×431312399² = 372060771062270402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431312309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4709 + ... + 29745.

It is an arithmetic number, because the mean of its divisors is an integer number (32449248).

Almost surely, 2^431312399 is an apocalyptic number.

431312399 is a deficient number, since it is larger than the sum of its proper divisors (87875569).

431312399 is a wasteful number, since it uses less digits than its factorization.

431312399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25174.

The product of its digits is 17496, while the sum is 35.

The square root of 431312399 is about 20768.0619943220. The cubic root of 431312399 is about 755.5513415046.

The spelling of 431312399 in words is "four hundred thirty-one million, three hundred twelve thousand, three hundred ninety-nine".