1231333147 has 12 divisors (see below), whose sum is σ = 1354910368. Its totient is φ = 1118185200.

The previous prime is 1231333141. The next prime is 1231333157. The reversal of 1231333147 is 7413331321.

It is not a de Polignac number, because 1231333147 - 2³ = 1231333139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231333141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118558 + ... + 128524.

Almost surely, 2^1231333147 is an apocalyptic number.

1231333147 is a deficient number, since it is larger than the sum of its proper divisors (123577221).

1231333147 is a wasteful number, since it uses less digits than its factorization.

1231333147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010 (or 10999 counting only the distinct ones).

The product of its digits is 4536, while the sum is 28.

The square root of 1231333147 is about 35090.3568947368. The cubic root of 1231333147 is about 1071.8282271345.

Adding to 1231333147 its reverse (7413331321), we get a palindrome (8644664468).

The spelling of 1231333147 in words is "one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred forty-seven".