1155052511 has 4 divisors (see below), whose sum is σ = 1156642032. Its totient is φ = 1153462992.

The previous prime is 1155052487. The next prime is 1155052517. The reversal of 1155052511 is 1152505511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1152505511 = 53 ⋅21745387.

It is a cyclic number.

It is not a de Polignac number, because 1155052511 - 2⁶ = 1155052447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155052517) 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, 793670 + ... + 795123.

It is an arithmetic number, because the mean of its divisors is an integer number (289160508).

Almost surely, 2^1155052511 is an apocalyptic number.

1155052511 is a deficient number, since it is larger than the sum of its proper divisors (1589521).

1155052511 is an equidigital number, since it uses as much as digits as its factorization.

1155052511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589520.

The product of its (nonzero) digits is 1250, while the sum is 26.

The square root of 1155052511 is about 33986.0634819627. The cubic root of 1155052511 is about 1049.2216487089.

The spelling of 1155052511 in words is "one billion, one hundred fifty-five million, fifty-two thousand, five hundred eleven".