15565055 has 8 divisors (see below), whose sum is σ = 20376144. Its totient is φ = 11320000.

The previous prime is 15565031. The next prime is 15565061. The reversal of 15565055 is 55056551.

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

It is not a de Polignac number, because 15565055 - 2⁸ = 15564799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141446 + ... + 141555.

It is an arithmetic number, because the mean of its divisors is an integer number (2547018).

Almost surely, 2^15565055 is an apocalyptic number.

15565055 is a deficient number, since it is larger than the sum of its proper divisors (4811089).

15565055 is a wasteful number, since it uses less digits than its factorization.

15565055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283017.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 15565055 is about 3945.2572793165. The cubic root of 15565055 is about 249.6798836103.

The spelling of 15565055 in words is "fifteen million, five hundred sixty-five thousand, fifty-five".