1156451231 has 16 divisors (see below), whose sum is σ = 1321645248. Its totient is φ = 1002432000.

The previous prime is 1156451221. The next prime is 1156451269. The reversal of 1156451231 is 1321546511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156451231 is a prime.

It is a super-2 number, since 2×1156451231² = 2674758899362830722, 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 = 1156451194 and 1156451203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156451221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96206 + ... + 107556.

It is an arithmetic number, because the mean of its divisors is an integer number (82602828).

Almost surely, 2^1156451231 is an apocalyptic number.

1156451231 is a deficient number, since it is larger than the sum of its proper divisors (165194017).

1156451231 is a wasteful number, since it uses less digits than its factorization.

1156451231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11842.

The product of its digits is 3600, while the sum is 29.

The square root of 1156451231 is about 34006.6351025796. The cubic root of 1156451231 is about 1049.6449989610.

Adding to 1156451231 its reverse (1321546511), we get a palindrome (2477997742).

The spelling of 1156451231 in words is "one billion, one hundred fifty-six million, four hundred fifty-one thousand, two hundred thirty-one".