1231333423 has 32 divisors (see below), whose sum is σ = 1341204480. Its totient is φ = 1128314880.

The previous prime is 1231333403. The next prime is 1231333463. The reversal of 1231333423 is 3243331321.

It is a cyclic number.

It is not a de Polignac number, because 1231333423 - 2⁵ = 1231333391 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 (1231333403) 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, 11507736 + ... + 11507842.

It is an arithmetic number, because the mean of its divisors is an integer number (41912640).

Almost surely, 2^1231333423 is an apocalyptic number.

1231333423 is a deficient number, since it is larger than the sum of its proper divisors (109871057).

1231333423 is a wasteful number, since it uses less digits than its factorization.

1231333423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367.

The product of its digits is 3888, while the sum is 25.

The square root of 1231333423 is about 35090.3608274409. The cubic root of 1231333423 is about 1071.8283072170.

Adding to 1231333423 its reverse (3243331321), we get a palindrome (4474664744).

The spelling of 1231333423 in words is "one billion, two hundred thirty-one million, three hundred thirty-three thousand, four hundred twenty-three".