15550855 has 8 divisors (see below), whose sum is σ = 18756000. Its totient is φ = 12377376.

The previous prime is 15550831. The next prime is 15550859. The reversal of 15550855 is 55805551.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15550855 - 2⁵ = 15550823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15550855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15550859) 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, 6820 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (2344500).

Almost surely, 2^15550855 is an apocalyptic number.

15550855 is a deficient number, since it is larger than the sum of its proper divisors (3205145).

15550855 is a wasteful number, since it uses less digits than its factorization.

15550855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15833.

The product of its (nonzero) digits is 25000, while the sum is 34.

The square root of 15550855 is about 3943.4572395298. The cubic root of 15550855 is about 249.6039328546.

The spelling of 15550855 in words is "fifteen million, five hundred fifty thousand, eight hundred fifty-five".