1155089031 has 4 divisors (see below), whose sum is σ = 1540118712. Its totient is φ = 770059352.

The previous prime is 1155089029. The next prime is 1155089057. The reversal of 1155089031 is 1309805511.

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 1155089031 - 2¹ = 1155089029 is a prime.

It is a super-2 number, since 2×1155089031² = 2668461339073037922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1155088983 and 1155089001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155089011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192514836 + ... + 192514841.

It is an arithmetic number, because the mean of its divisors is an integer number (385029678).

Almost surely, 2^1155089031 is an apocalyptic number.

1155089031 is a deficient number, since it is larger than the sum of its proper divisors (385029681).

1155089031 is an equidigital number, since it uses as much as digits as its factorization.

1155089031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385029680.

The product of its (nonzero) digits is 5400, while the sum is 33.

The square root of 1155089031 is about 33986.6007567688. The cubic root of 1155089031 is about 1049.2327065527.

The spelling of 1155089031 in words is "one billion, one hundred fifty-five million, eighty-nine thousand, thirty-one".