1155545203 has 4 divisors (see below), whose sum is σ = 1155984400. Its totient is φ = 1155106008.

The previous prime is 1155545137. The next prime is 1155545219. The reversal of 1155545203 is 3025455511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155545203 is a prime.

It is a super-2 number, since 2×1155545203² = 2670569432352622418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155545603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215628 + ... + 220921.

It is an arithmetic number, because the mean of its divisors is an integer number (288996100).

Almost surely, 2^1155545203 is an apocalyptic number.

1155545203 is a deficient number, since it is larger than the sum of its proper divisors (439197).

1155545203 is an equidigital number, since it uses as much as digits as its factorization.

1155545203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439196.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1155545203 is about 33993.3111508720. The cubic root of 1155545203 is about 1049.3708106514.

The spelling of 1155545203 in words is "one billion, one hundred fifty-five million, five hundred forty-five thousand, two hundred three".