431550420431 has 4 divisors (see below), whose sum is σ = 464746606632. Its totient is φ = 398354234232.

The previous prime is 431550420403. The next prime is 431550420443. The reversal of 431550420431 is 134024055134.

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 431550420431 - 2¹⁰ = 431550419407 is a prime.

It is a super-2 number, since 2×431550420431² (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 (431550420491) 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, 16598093081 + ... + 16598093106.

It is an arithmetic number, because the mean of its divisors is an integer number (116186651658).

Almost surely, 2^431550420431 is an apocalyptic number.

431550420431 is a deficient number, since it is larger than the sum of its proper divisors (33196186201).

431550420431 is a wasteful number, since it uses less digits than its factorization.

431550420431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33196186200.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 431550420431 its reverse (134024055134), we get a palindrome (565574475565).

The spelling of 431550420431 in words is "four hundred thirty-one billion, five hundred fifty million, four hundred twenty thousand, four hundred thirty-one".