55661159 has 4 divisors (see below), whose sum is σ = 55685760. Its totient is φ = 55636560.

The previous prime is 55661147. The next prime is 55661171. The reversal of 55661159 is 95116655.

It is a happy number.

55661159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95116655 = 5 ⋅19023331.

It is an interprime number because it is at equal distance from previous prime (55661147) and next prime (55661171).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55661159 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 (55661129) 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 3 ways as a sum of consecutive naturals, for example, 8519 + ... + 13560.

It is an arithmetic number, because the mean of its divisors is an integer number (13921440).

Almost surely, 2^55661159 is an apocalyptic number.

55661159 is a deficient number, since it is larger than the sum of its proper divisors (24601).

55661159 is a wasteful number, since it uses less digits than its factorization.

55661159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24600.

The product of its digits is 40500, while the sum is 38.

The square root of 55661159 is about 7460.6406561367. The cubic root of 55661159 is about 381.8130326884.

The spelling of 55661159 in words is "fifty-five million, six hundred sixty-one thousand, one hundred fifty-nine".