431421233 has 4 divisors (see below), whose sum is σ = 431502708. Its totient is φ = 431339760.

The previous prime is 431421227. The next prime is 431421259. The reversal of 431421233 is 332124134.

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 68442529 + 362978704 = 8273^2 + 19052^2 .

It is a cyclic number.

It is not a de Polignac number, because 431421233 - 2⁴ = 431421217 is a prime.

It is a super-2 number, since 2×431421233² = 372248560566480578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431421199 and 431421208.

It is not an unprimeable number, because it can be changed into a prime (431420233) 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, 32198 + ... + 43583.

It is an arithmetic number, because the mean of its divisors is an integer number (107875677).

Almost surely, 2^431421233 is an apocalyptic number.

It is an amenable number.

431421233 is a deficient number, since it is larger than the sum of its proper divisors (81475).

431421233 is an equidigital number, since it uses as much as digits as its factorization.

431421233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81474.

The product of its digits is 1728, while the sum is 23.

The square root of 431421233 is about 20770.6820542803. The cubic root of 431421233 is about 755.6148861337.

Adding to 431421233 its reverse (332124134), we get a palindrome (763545367).

The spelling of 431421233 in words is "four hundred thirty-one million, four hundred twenty-one thousand, two hundred thirty-three".