1151505055 has 4 divisors (see below), whose sum is σ = 1381806072. Its totient is φ = 921204040.

The previous prime is 1151505023. The next prime is 1151505067. The reversal of 1151505055 is 5505051511.

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

It is not a de Polignac number, because 1151505055 - 2⁵ = 1151505023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115150501 + ... + 115150510.

It is an arithmetic number, because the mean of its divisors is an integer number (345451518).

Almost surely, 2^1151505055 is an apocalyptic number.

1151505055 is a deficient number, since it is larger than the sum of its proper divisors (230301017).

1151505055 is an equidigital number, since it uses as much as digits as its factorization.

1151505055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230301016.

The product of its (nonzero) digits is 3125, while the sum is 28.

The square root of 1151505055 is about 33933.8334851811. The cubic root of 1151505055 is about 1048.1464062184.

Adding to 1151505055 its reverse (5505051511), we get a palindrome (6656556566).

The spelling of 1151505055 in words is "one billion, one hundred fifty-one million, five hundred five thousand, fifty-five".