1155133205 has 4 divisors (see below), whose sum is σ = 1386159852. Its totient is φ = 924106560.

The previous prime is 1155133201. The next prime is 1155133207. The reversal of 1155133205 is 5023315511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5023315511 = 41941 ⋅119771.

It can be written as a sum of positive squares in 2 ways, for example, as 180257476 + 974875729 = 13426^2 + 31223^2 .

It is not a de Polignac number, because 1155133205 - 2² = 1155133201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155133201) 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, 115513316 + ... + 115513325.

It is an arithmetic number, because the mean of its divisors is an integer number (346539963).

Almost surely, 2^1155133205 is an apocalyptic number.

It is an amenable number.

1155133205 is a deficient number, since it is larger than the sum of its proper divisors (231026647).

1155133205 is an equidigital number, since it uses as much as digits as its factorization.

1155133205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231026646.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1155133205 is about 33987.2506243150. The cubic root of 1155133205 is about 1049.2460816299.

Adding to 1155133205 its reverse (5023315511), we get a palindrome (6178448716).

The spelling of 1155133205 in words is "one billion, one hundred fifty-five million, one hundred thirty-three thousand, two hundred five".