431420431 has 4 divisors (see below), whose sum is σ = 464606632. Its totient is φ = 398234232.

The previous prime is 431420399. The next prime is 431420461. The reversal of 431420431 is 134024134.

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 431420431 - 2⁵ = 431420399 is a prime.

It is a super-2 number, since 2×431420431² = 372247176568451522, which 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 (431420461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16593081 + ... + 16593106.

It is an arithmetic number, because the mean of its divisors is an integer number (116151658).

Almost surely, 2^431420431 is an apocalyptic number.

431420431 is a deficient number, since it is larger than the sum of its proper divisors (33186201).

431420431 is a wasteful number, since it uses less digits than its factorization.

431420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33186200.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 431420431 is about 20770.6627482129. The cubic root of 431420431 is about 755.6144179111.

Adding to 431420431 its reverse (134024134), we get a palindrome (565444565).

The spelling of 431420431 in words is "four hundred thirty-one million, four hundred twenty thousand, four hundred thirty-one".