1231343343 has 32 divisors (see below), whose sum is σ = 1886668800. Its totient is φ = 792892800.

The previous prime is 1231343257. The next prime is 1231343369. The reversal of 1231343343 is 3433431321.

1231343343 is a `hidden beast` number, since 1 + 2 + 313 + 4 + 3 + 343 = 666.

It is not a de Polignac number, because 1231343343 - 2²¹ = 1229246191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231343843) 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, 577303 + ... + 579431.

It is an arithmetic number, because the mean of its divisors is an integer number (58958400).

Almost surely, 2^1231343343 is an apocalyptic number.

1231343343 is a deficient number, since it is larger than the sum of its proper divisors (655325457).

1231343343 is a wasteful number, since it uses less digits than its factorization.

1231343343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860 (or 2854 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 1231343343 is about 35090.5021765149. The cubic root of 1231343343 is about 1071.8311855352.

Adding to 1231343343 its reverse (3433431321), we get a palindrome (4664774664).

The spelling of 1231343343 in words is "one billion, two hundred thirty-one million, three hundred forty-three thousand, three hundred forty-three".