1155156532531 has 4 divisors (see below), whose sum is σ = 1169778767200. Its totient is φ = 1140534297864.

The previous prime is 1155156532513. The next prime is 1155156532547. The reversal of 1155156532531 is 1352356515511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155156532531 - 2⁵ = 1155156532499 is a prime.

It is a super-2 number, since 2×1155156532531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155156532571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7311117216 + ... + 7311117373.

It is an arithmetic number, because the mean of its divisors is an integer number (292444691800).

Almost surely, 2^{1155156532531} is an apocalyptic number.

1155156532531 is a deficient number, since it is larger than the sum of its proper divisors (14622234669).

1155156532531 is an equidigital number, since it uses as much as digits as its factorization.

1155156532531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14622234668.

The product of its digits is 337500, while the sum is 43.

The spelling of 1155156532531 in words is "one trillion, one hundred fifty-five billion, one hundred fifty-six million, five hundred thirty-two thousand, five hundred thirty-one".