1231345323 has 18 divisors (see below), whose sum is σ = 1925952756. Its totient is φ = 757750032.

The previous prime is 1231345321. The next prime is 1231345337. The reversal of 1231345323 is 3235431321.

1231345323 is a `hidden beast` number, since 123 + 1 + 3 + 4 + 532 + 3 = 666.

It is not a de Polignac number, because 1231345323 - 2¹ = 1231345321 is a prime.

It is a super-2 number, since 2×1231345323² = 3032422608947948658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231345321) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 403261 + ... + 406302.

Almost surely, 2^1231345323 is an apocalyptic number.

1231345323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231345323 is a deficient number, since it is larger than the sum of its proper divisors (694607433).

1231345323 is a wasteful number, since it uses less digits than its factorization.

1231345323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809595 (or 809579 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 1231345323 is about 35090.5303892660. The cubic root of 1231345323 is about 1071.8317600364.

Adding to 1231345323 its reverse (3235431321), we get a palindrome (4466776644).

The spelling of 1231345323 in words is "one billion, two hundred thirty-one million, three hundred forty-five thousand, three hundred twenty-three".