1155022513 has 4 divisors (see below), whose sum is σ = 1156217920. Its totient is φ = 1153827108.

The previous prime is 1155022501. The next prime is 1155022537. The reversal of 1155022513 is 3152205511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1155022513 - 2²⁹ = 618151601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155022543) 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, 596253 + ... + 598186.

It is an arithmetic number, because the mean of its divisors is an integer number (289054480).

Almost surely, 2^1155022513 is an apocalyptic number.

It is an amenable number.

1155022513 is a deficient number, since it is larger than the sum of its proper divisors (1195407).

1155022513 is an equidigital number, since it uses as much as digits as its factorization.

1155022513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195406.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1155022513 is about 33985.6221511391. The cubic root of 1155022513 is about 1049.2125654787.

The spelling of 1155022513 in words is "one billion, one hundred fifty-five million, twenty-two thousand, five hundred thirteen".