15840055 has 16 divisors (see below), whose sum is σ = 23698944. Its totient is φ = 9874080.

The previous prime is 15840043. The next prime is 15840059. The reversal of 15840055 is 55004851.

It is not a de Polignac number, because 15840055 - 2⁷ = 15839927 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 (15840059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20187 + ... + 20956.

It is an arithmetic number, because the mean of its divisors is an integer number (1481184).

Almost surely, 2^15840055 is an apocalyptic number.

15840055 is a deficient number, since it is larger than the sum of its proper divisors (7858889).

15840055 is a wasteful number, since it uses less digits than its factorization.

15840055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41166.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 15840055 is about 3979.9566580555. The cubic root of 15840055 is about 251.1417378014.

The spelling of 15840055 in words is "fifteen million, eight hundred forty thousand, fifty-five".