1155541551 has 8 divisors (see below), whose sum is σ = 1607710080. Its totient is φ = 736867032.

The previous prime is 1155541547. The next prime is 1155541559. The reversal of 1155541551 is 1551455511.

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

It is not a de Polignac number, because 1155541551 - 2² = 1155541547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155541559) 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 7 ways as a sum of consecutive naturals, for example, 8373421 + ... + 8373558.

It is an arithmetic number, because the mean of its divisors is an integer number (200963760).

Almost surely, 2^1155541551 is an apocalyptic number.

1155541551 is a deficient number, since it is larger than the sum of its proper divisors (452168529).

1155541551 is a wasteful number, since it uses less digits than its factorization.

1155541551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16747005.

The product of its digits is 12500, while the sum is 33.

The square root of 1155541551 is about 33993.2574343795. The cubic root of 1155541551 is about 1049.3697051685.

The spelling of 1155541551 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, five hundred fifty-one".