1155522057 has 4 divisors (see below), whose sum is σ = 1540696080. Its totient is φ = 770348036.

The previous prime is 1155522029. The next prime is 1155522061. The reversal of 1155522057 is 7502255511.

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 1155522057 - 2¹⁸ = 1155259913 is a prime.

It is a super-2 number, since 2×1155522057² = 2670462448427022498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155522077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192587007 + ... + 192587012.

It is an arithmetic number, because the mean of its divisors is an integer number (385174020).

Almost surely, 2^1155522057 is an apocalyptic number.

It is an amenable number.

1155522057 is a deficient number, since it is larger than the sum of its proper divisors (385174023).

1155522057 is an equidigital number, since it uses as much as digits as its factorization.

1155522057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385174022.

The product of its (nonzero) digits is 17500, while the sum is 33.

The square root of 1155522057 is about 33992.9706998373. The cubic root of 1155522057 is about 1049.3638041755.

Adding to 1155522057 its reverse (7502255511), we get a palindrome (8657777568).

The spelling of 1155522057 in words is "one billion, one hundred fifty-five million, five hundred twenty-two thousand, fifty-seven".