1155532201 has 4 divisors (see below), whose sum is σ = 1155620752. Its totient is φ = 1155443652.

The previous prime is 1155532199. The next prime is 1155532207. The reversal of 1155532201 is 1022355511.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1155532201 - 2¹ = 1155532199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155532207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20415 + ... + 52228.

It is an arithmetic number, because the mean of its divisors is an integer number (288905188).

Almost surely, 2^1155532201 is an apocalyptic number.

It is an amenable number.

1155532201 is a deficient number, since it is larger than the sum of its proper divisors (88551).

1155532201 is an equidigital number, since it uses as much as digits as its factorization.

1155532201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88550.

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

The square root of 1155532201 is about 33993.1199068282. The cubic root of 1155532201 is about 1049.3668748554.

Adding to 1155532201 its reverse (1022355511), we get a palindrome (2177887712).

The spelling of 1155532201 in words is "one billion, one hundred fifty-five million, five hundred thirty-two thousand, two hundred one".