431243523 has 6 divisors (see below), whose sum is σ = 622907324. Its totient is φ = 287495676.

The previous prime is 431243503. The next prime is 431243569. The reversal of 431243523 is 325342134.

It is not a de Polignac number, because 431243523 - 2⁶ = 431243459 is a prime.

It is a super-2 number, since 2×431243523² = 371941952258903058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431243503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23957965 + ... + 23957982.

Almost surely, 2^431243523 is an apocalyptic number.

431243523 is a deficient number, since it is larger than the sum of its proper divisors (191663801).

431243523 is a wasteful number, since it uses less digits than its factorization.

431243523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47915953 (or 47915950 counting only the distinct ones).

The product of its digits is 8640, while the sum is 27.

The square root of 431243523 is about 20766.4037088755. The cubic root of 431243523 is about 755.5111215275.

Adding to 431243523 its reverse (325342134), we get a palindrome (756585657).

The spelling of 431243523 in words is "four hundred thirty-one million, two hundred forty-three thousand, five hundred twenty-three".