1155222539 has 4 divisors (see below), whose sum is σ = 1223176824. Its totient is φ = 1087268256.

The previous prime is 1155222521. The next prime is 1155222571. The reversal of 1155222539 is 9352225511.

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 1155222539 - 2⁸ = 1155222283 is a prime.

It is a super-2 number, since 2×1155222539² = 2669078229227213042, 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 = 1155222499 and 1155222508.

It is not an unprimeable number, because it can be changed into a prime (1155222139) 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, 33977117 + ... + 33977150.

It is an arithmetic number, because the mean of its divisors is an integer number (305794206).

Almost surely, 2^1155222539 is an apocalyptic number.

1155222539 is a deficient number, since it is larger than the sum of its proper divisors (67954285).

1155222539 is an equidigital number, since it uses as much as digits as its factorization.

1155222539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67954284.

The product of its digits is 27000, while the sum is 35.

The square root of 1155222539 is about 33988.5648270120. The cubic root of 1155222539 is about 1049.2731292849.

The spelling of 1155222539 in words is "one billion, one hundred fifty-five million, two hundred twenty-two thousand, five hundred thirty-nine".