1423231311 has 4 divisors (see below), whose sum is σ = 1897641752. Its totient is φ = 948820872.

The previous prime is 1423231301. The next prime is 1423231357. The reversal of 1423231311 is 1131323241.

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

It is a de Polignac number, because none of the positive numbers 2^k-1423231311 is a prime.

It is a super-2 number, since 2×1423231311² = 4051174729221557442, 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 (1423231301) 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, 237205216 + ... + 237205221.

It is an arithmetic number, because the mean of its divisors is an integer number (474410438).

Almost surely, 2^1423231311 is an apocalyptic number.

1423231311 is a deficient number, since it is larger than the sum of its proper divisors (474410441).

1423231311 is an equidigital number, since it uses as much as digits as its factorization.

1423231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474410440.

The product of its digits is 432, while the sum is 21.

The square root of 1423231311 is about 37725.7380444704. The cubic root of 1423231311 is about 1124.8427924526.

Adding to 1423231311 its reverse (1131323241), we get a palindrome (2554554552).

The spelling of 1423231311 in words is "one billion, four hundred twenty-three million, two hundred thirty-one thousand, three hundred eleven".