1155530201 has 48 divisors (see below), whose sum is σ = 1479628800. Its totient is φ = 896168448.

The previous prime is 1155530197. The next prime is 1155530209. The reversal of 1155530201 is 1020355511.

It is a happy number.

It is not a de Polignac number, because 1155530201 - 2² = 1155530197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155530209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3428705 + ... + 3429041.

It is an arithmetic number, because the mean of its divisors is an integer number (30825600).

Almost surely, 2^1155530201 is an apocalyptic number.

It is an amenable number.

1155530201 is a deficient number, since it is larger than the sum of its proper divisors (324098599).

1155530201 is a wasteful number, since it uses less digits than its factorization.

1155530201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1155530201 is about 33993.0904890979. The cubic root of 1155530201 is about 1049.3662694389.

Adding to 1155530201 its reverse (1020355511), we get a palindrome (2175885712).

The spelling of 1155530201 in words is "one billion, one hundred fifty-five million, five hundred thirty thousand, two hundred one".