431431240399 has 4 divisors (see below), whose sum is σ = 439571452536. Its totient is φ = 423291028264.

The previous prime is 431431240381. The next prime is 431431240411. The reversal of 431431240399 is 993042134134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 431431240399 - 2⁷ = 431431240271 is a prime.

It is a super-2 number, since 2×431431240399² (a number of 24 digits) 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 (431431240699) 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, 4070105989 + ... + 4070106094.

It is an arithmetic number, because the mean of its divisors is an integer number (109892863134).

Almost surely, 2^431431240399 is an apocalyptic number.

431431240399 is a deficient number, since it is larger than the sum of its proper divisors (8140212137).

431431240399 is an equidigital number, since it uses as much as digits as its factorization.

431431240399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140212136.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 431431240399 in words is "four hundred thirty-one billion, four hundred thirty-one million, two hundred forty thousand, three hundred ninety-nine".