1231314243 has 4 divisors (see below), whose sum is σ = 1641752328. Its totient is φ = 820876160.

The previous prime is 1231314241. The next prime is 1231314257. The reversal of 1231314243 is 3424131321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231314243 - 2¹ = 1231314241 is a prime.

It is a super-2 number, since 2×1231314243² = 3032269530029326098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231314241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205219038 + ... + 205219043.

It is an arithmetic number, because the mean of its divisors is an integer number (410438082).

Almost surely, 2^1231314243 is an apocalyptic number.

1231314243 is a deficient number, since it is larger than the sum of its proper divisors (410438085).

1231314243 is an equidigital number, since it uses as much as digits as its factorization.

1231314243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410438084.

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

The square root of 1231314243 is about 35090.0875319512. The cubic root of 1231314243 is about 1071.8227420377.

Adding to 1231314243 its reverse (3424131321), we get a palindrome (4655445564).

The spelling of 1231314243 in words is "one billion, two hundred thirty-one million, three hundred fourteen thousand, two hundred forty-three".