1151512231 has 2 divisors, whose sum is σ = 1151512232. Its totient is φ = 1151512230.

The previous prime is 1151512223. The next prime is 1151512249. The reversal of 1151512231 is 1322151511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1151512231 - 2³ = 1151512223 is a prime.

It is a super-2 number, since 2×1151512231² = 2651960836285194722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151512031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575756115 + 575756116.

It is an arithmetic number, because the mean of its divisors is an integer number (575756116).

Almost surely, 2^1151512231 is an apocalyptic number.

1151512231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151512231 is an equidigital number, since it uses as much as digits as its factorization.

1151512231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 22.

The square root of 1151512231 is about 33933.9392201966. The cubic root of 1151512231 is about 1048.1485835089.

Adding to 1151512231 its reverse (1322151511), we get a palindrome (2473663742).

The spelling of 1151512231 in words is "one billion, one hundred fifty-one million, five hundred twelve thousand, two hundred thirty-one".