1234431231 has 12 divisors (see below), whose sum is σ = 1809139416. Its totient is φ = 748139920.

The previous prime is 1234431203. The next prime is 1234431271. The reversal of 1234431231 is 1321344321.

It is a happy number.

It is not a de Polignac number, because 1234431231 - 2⁵ = 1234431199 is a prime.

It is a super-2 number, since 2×1234431231² = 3047640928136350722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234431271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1699956 + ... + 1700681.

It is an arithmetic number, because the mean of its divisors is an integer number (150761618).

Almost surely, 2^1234431231 is an apocalyptic number.

1234431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1234431231 is a deficient number, since it is larger than the sum of its proper divisors (574708185).

1234431231 is a wasteful number, since it uses less digits than its factorization.

1234431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400662 (or 3400651 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1234431231 is about 35134.4735409540. The cubic root of 1234431231 is about 1072.7263953361.

Adding to 1234431231 its reverse (1321344321), we get a palindrome (2555775552).

The spelling of 1234431231 in words is "one billion, two hundred thirty-four million, four hundred thirty-one thousand, two hundred thirty-one".