55891155 has 24 divisors (see below), whose sum is σ = 95002992. Its totient is φ = 28052992.

The previous prime is 55891151. The next prime is 55891169. The reversal of 55891155 is 55119855.

It is not a de Polignac number, because 55891155 - 2² = 55891151 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55891151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2112 + ... + 10781.

It is an arithmetic number, because the mean of its divisors is an integer number (3958458).

Almost surely, 2^55891155 is an apocalyptic number.

55891155 is a deficient number, since it is larger than the sum of its proper divisors (39111837).

55891155 is a wasteful number, since it uses less digits than its factorization.

55891155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935 (or 12918 counting only the distinct ones).

The product of its digits is 45000, while the sum is 39.

The square root of 55891155 is about 7476.0387238162. The cubic root of 55891155 is about 382.3382031748.

The spelling of 55891155 in words is "fifty-five million, eight hundred ninety-one thousand, one hundred fifty-five".