431213522 has 16 divisors (see below), whose sum is σ = 675438912. Its totient is φ = 206081040.

The previous prime is 431213509. The next prime is 431213561. The reversal of 431213522 is 225312134.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 83372 + ... + 88392.

It is an arithmetic number, because the mean of its divisors is an integer number (42214932).

Almost surely, 2^431213522 is an apocalyptic number.

431213522 is a deficient number, since it is larger than the sum of its proper divisors (244225390).

431213522 is a wasteful number, since it uses less digits than its factorization.

431213522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913.

The product of its digits is 1440, while the sum is 23.

The square root of 431213522 is about 20765.6813516918. The cubic root of 431213522 is about 755.4936011756.

Adding to 431213522 its reverse (225312134), we get a palindrome (656525656).

The spelling of 431213522 in words is "four hundred thirty-one million, two hundred thirteen thousand, five hundred twenty-two".