1156165231 has 8 divisors (see below), whose sum is σ = 1246747824. Its totient is φ = 1065817920.

The previous prime is 1156165187. The next prime is 1156165247. The reversal of 1156165231 is 1325616511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1156165231 - 2⁷ = 1156165103 is a prime.

It is a super-2 number, since 2×1156165231² = 2673436082746566722, 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 = 1156165193 and 1156165202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156165531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48541 + ... + 68326.

It is an arithmetic number, because the mean of its divisors is an integer number (155843478).

Almost surely, 2^1156165231 is an apocalyptic number.

1156165231 is a deficient number, since it is larger than the sum of its proper divisors (90582593).

1156165231 is a wasteful number, since it uses less digits than its factorization.

1156165231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117641.

The product of its digits is 5400, while the sum is 31.

The square root of 1156165231 is about 34002.4297808260. The cubic root of 1156165231 is about 1049.5584631832.

The spelling of 1156165231 in words is "one billion, one hundred fifty-six million, one hundred sixty-five thousand, two hundred thirty-one".