15545855 has 8 divisors (see below), whose sum is σ = 20090112. Its totient is φ = 11479968.

The previous prime is 15545843. The next prime is 15545867. The reversal of 15545855 is 55854551.

It is an interprime number because it is at equal distance from previous prime (15545843) and next prime (15545867).

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 15545855 - 2⁴ = 15545839 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, 119519 + ... + 119648.

It is an arithmetic number, because the mean of its divisors is an integer number (2511264).

Almost surely, 2^15545855 is an apocalyptic number.

15545855 is a deficient number, since it is larger than the sum of its proper divisors (4544257).

15545855 is a wasteful number, since it uses less digits than its factorization.

15545855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239185.

The product of its digits is 100000, while the sum is 38.

The square root of 15545855 is about 3942.8232270798. The cubic root of 15545855 is about 249.5771786248.

The spelling of 15545855 in words is "fifteen million, five hundred forty-five thousand, eight hundred fifty-five".