431605998313 has 4 divisors (see below), whose sum is σ = 493263998080. Its totient is φ = 369947998548.

The previous prime is 431605998289. The next prime is 431605998319. The reversal of 431605998313 is 313899506134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313899506134 = 2 ⋅156949753067.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431605998313 is a prime.

It is a super-2 number, since 2×431605998313² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (431605998319) 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, 30828999873 + ... + 30828999886.

It is an arithmetic number, because the mean of its divisors is an integer number (123315999520).

Almost surely, 2^431605998313 is an apocalyptic number.

It is an amenable number.

431605998313 is a deficient number, since it is larger than the sum of its proper divisors (61657999767).

431605998313 is an equidigital number, since it uses as much as digits as its factorization.

431605998313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61657999766.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 431605998313 in words is "four hundred thirty-one billion, six hundred five million, nine hundred ninety-eight thousand, three hundred thirteen".