1155505303 has 8 divisors (see below), whose sum is σ = 1213733376. Its totient is φ = 1097943000.

The previous prime is 1155505297. The next prime is 1155505313. The reversal of 1155505303 is 3035055511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155505303 - 2¹³ = 1155497111 is a prime.

It is a super-2 number, since 2×1155505303² = 2670385010522243618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155505313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162883 + ... + 169828.

It is an arithmetic number, because the mean of its divisors is an integer number (151716672).

Almost surely, 2^1155505303 is an apocalyptic number.

1155505303 is a deficient number, since it is larger than the sum of its proper divisors (58228073).

1155505303 is a wasteful number, since it uses less digits than its factorization.

1155505303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332885.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 1155505303 is about 33992.7242656425. The cubic root of 1155505303 is about 1049.3587325497.

The spelling of 1155505303 in words is "one billion, one hundred fifty-five million, five hundred five thousand, three hundred three".