1155231147 has 16 divisors (see below), whose sum is σ = 1761149952. Its totient is φ = 659832960.

The previous prime is 1155231137. The next prime is 1155231149. The reversal of 1155231147 is 7411325511.

It is not a de Polignac number, because 1155231147 - 2⁸ = 1155230891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155231149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40147 + ... + 62627.

It is an arithmetic number, because the mean of its divisors is an integer number (110071872).

Almost surely, 2^1155231147 is an apocalyptic number.

1155231147 is a deficient number, since it is larger than the sum of its proper divisors (605918805).

1155231147 is a wasteful number, since it uses less digits than its factorization.

1155231147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24938.

The product of its digits is 4200, while the sum is 30.

The square root of 1155231147 is about 33988.6914576010. The cubic root of 1155231147 is about 1049.2757354554.

Adding to 1155231147 its reverse (7411325511), we get a palindrome (8566556658).

The spelling of 1155231147 in words is "one billion, one hundred fifty-five million, two hundred thirty-one thousand, one hundred forty-seven".