1151231031 has 6 divisors (see below), whose sum is σ = 1662889280. Its totient is φ = 767487348.

The previous prime is 1151231023. The next prime is 1151231047. The reversal of 1151231031 is 1301321511.

It is not a de Polignac number, because 1151231031 - 2³ = 1151231023 is a prime.

It is a super-2 number, since 2×1151231031² = 2650665773474645922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1151230995 and 1151231013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151211031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63957271 + ... + 63957288.

Almost surely, 2^1151231031 is an apocalyptic number.

1151231031 is a deficient number, since it is larger than the sum of its proper divisors (511658249).

1151231031 is a wasteful number, since it uses less digits than its factorization.

1151231031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127914565 (or 127914562 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1151231031 is about 33929.7956227266. The cubic root of 1151231031 is about 1048.0632570518.

Adding to 1151231031 its reverse (1301321511), we get a palindrome (2452552542).

The spelling of 1151231031 in words is "one billion, one hundred fifty-one million, two hundred thirty-one thousand, thirty-one".