1151055019 has 4 divisors (see below), whose sum is σ = 1151377744. Its totient is φ = 1150732296.

The previous prime is 1151055011. The next prime is 1151055041. The reversal of 1151055019 is 9105501511.

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

It is a cyclic number.

It is not a de Polignac number, because 1151055019 - 2³ = 1151055011 is a prime.

It is a super-2 number, since 2×1151055019² = 2649855313530180722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151055011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155952 + ... + 163165.

It is an arithmetic number, because the mean of its divisors is an integer number (287844436).

Almost surely, 2^1151055019 is an apocalyptic number.

1151055019 is a deficient number, since it is larger than the sum of its proper divisors (322725).

1151055019 is an equidigital number, since it uses as much as digits as its factorization.

1151055019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322724.

The product of its (nonzero) digits is 1125, while the sum is 28.

The square root of 1151055019 is about 33927.2017561130. The cubic root of 1151055019 is about 1048.0098414451.

The spelling of 1151055019 in words is "one billion, one hundred fifty-one million, fifty-five thousand, nineteen".