1231143235 has 32 divisors (see below), whose sum is σ = 1749859200. Its totient is φ = 813603840.

The previous prime is 1231143223. The next prime is 1231143259. The reversal of 1231143235 is 5323411321.

It is a happy number.

It is not a de Polignac number, because 1231143235 - 2⁹ = 1231142723 is a prime.

It is a super-3 number, since 3×1231143235³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954471 + ... + 955759.

It is an arithmetic number, because the mean of its divisors is an integer number (54683100).

Almost surely, 2^1231143235 is an apocalyptic number.

1231143235 is a deficient number, since it is larger than the sum of its proper divisors (518715965).

1231143235 is a wasteful number, since it uses less digits than its factorization.

1231143235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its digits is 2160, while the sum is 25.

The square root of 1231143235 is about 35087.6507478058. The cubic root of 1231143235 is about 1071.7731205999.

Adding to 1231143235 its reverse (5323411321), we get a palindrome (6554554556).

The spelling of 1231143235 in words is "one billion, two hundred thirty-one million, one hundred forty-three thousand, two hundred thirty-five".