431213523 has 32 divisors (see below), whose sum is σ = 636733440. Its totient is φ = 257890560.

The previous prime is 431213509. The next prime is 431213561. The reversal of 431213523 is 325312134.

It is not a de Polignac number, because 431213523 - 2¹⁰ = 431212499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431213493 and 431213502.

It is not an unprimeable number, because it can be changed into a prime (431213423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765640 + ... + 766202.

It is an arithmetic number, because the mean of its divisors is an integer number (19897920).

Almost surely, 2^431213523 is an apocalyptic number.

431213523 is a deficient number, since it is larger than the sum of its proper divisors (205519917).

431213523 is a wasteful number, since it uses less digits than its factorization.

431213523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its digits is 2160, while the sum is 24.

The square root of 431213523 is about 20765.6813757700. The cubic root of 431213523 is about 755.4936017596.

Adding to 431213523 its reverse (325312134), we get a palindrome (756525657).

The spelling of 431213523 in words is "four hundred thirty-one million, two hundred thirteen thousand, five hundred twenty-three".