1423213231 has 4 divisors (see below), whose sum is σ = 1552596264. Its totient is φ = 1293830200.

The previous prime is 1423213229. The next prime is 1423213237. The reversal of 1423213231 is 1323123241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1423213231 - 2¹ = 1423213229 is a prime.

It is a super-2 number, since 2×1423213231² = 4051071801786918722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423213237) 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, 64691500 + ... + 64691521.

It is an arithmetic number, because the mean of its divisors is an integer number (388149066).

Almost surely, 2^1423213231 is an apocalyptic number.

1423213231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1423213231 is a deficient number, since it is larger than the sum of its proper divisors (129383033).

1423213231 is a wasteful number, since it uses less digits than its factorization.

1423213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129383032.

The product of its digits is 864, while the sum is 22.

The square root of 1423213231 is about 37725.4984195040. The cubic root of 1423213231 is about 1124.8380292906.

Adding to 1423213231 its reverse (1323123241), we get a palindrome (2746336472).

The spelling of 1423213231 in words is "one billion, four hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-one".