423431213 has 4 divisors (see below), whose sum is σ = 425438208. Its totient is φ = 421424220.

The previous prime is 423431153. The next prime is 423431221. The reversal of 423431213 is 312134324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 423431213 - 2¹⁸ = 423169069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423431273) 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, 1003181 + ... + 1003602.

It is an arithmetic number, because the mean of its divisors is an integer number (106359552).

Almost surely, 2^423431213 is an apocalyptic number.

It is an amenable number.

423431213 is a deficient number, since it is larger than the sum of its proper divisors (2006995).

423431213 is a wasteful number, since it uses less digits than its factorization.

423431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006994.

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

The square root of 423431213 is about 20577.4442776551. Note that the first 3 decimals coincide. The cubic root of 423431213 is about 750.9210686766.

Adding to 423431213 its reverse (312134324), we get a palindrome (735565537).

The spelling of 423431213 in words is "four hundred twenty-three million, four hundred thirty-one thousand, two hundred thirteen".