1231342431 has 8 divisors (see below), whose sum is σ = 1791043584. Its totient is φ = 746268120.

The previous prime is 1231342423. The next prime is 1231342447. The reversal of 1231342431 is 1342431321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231342431 - 2³ = 1231342423 is a prime.

It is a super-2 number, since 2×1231342431² = 3032408364761979522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231342471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18656671 + ... + 18656736.

It is an arithmetic number, because the mean of its divisors is an integer number (223880448).

Almost surely, 2^1231342431 is an apocalyptic number.

1231342431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231342431 is a deficient number, since it is larger than the sum of its proper divisors (559701153).

1231342431 is a wasteful number, since it uses less digits than its factorization.

1231342431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37313421.

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

The square root of 1231342431 is about 35090.4891815432. The cubic root of 1231342431 is about 1071.8309209163.

Adding to 1231342431 its reverse (1342431321), we get a palindrome (2573773752).

The spelling of 1231342431 in words is "one billion, two hundred thirty-one million, three hundred forty-two thousand, four hundred thirty-one".