431240683975517 has 4 divisors (see below), whose sum is σ = 464413044281340. Its totient is φ = 398068323669696.

The previous prime is 431240683975441. The next prime is 431240683975523. The reversal of 431240683975517 is 715579386042134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 196280408220121 + 234960275755396 = 14010011^2 + 15328414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431240683975517 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 (431240683975537) 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, 16586180152892 + ... + 16586180152917.

It is an arithmetic number, because the mean of its divisors is an integer number (116103261070335).

It is a 2-persistent number, because it is pandigital, and so is 2⋅431240683975517 = 862481367951034, but 3⋅431240683975517 = 1293722051926551 is not.

Almost surely, 2^{431240683975517} is an apocalyptic number.

It is an amenable number.

431240683975517 is a deficient number, since it is larger than the sum of its proper divisors (33172360305823).

431240683975517 is a wasteful number, since it uses less digits than its factorization.

431240683975517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33172360305822.

The product of its (nonzero) digits is 152409600, while the sum is 65.

The spelling of 431240683975517 in words is "four hundred thirty-one trillion, two hundred forty billion, six hundred eighty-three million, nine hundred seventy-five thousand, five hundred seventeen".