15216055 has 8 divisors (see below), whose sum is σ = 19220400. Its totient is φ = 11532096.

The previous prime is 15216049. The next prime is 15216059. The reversal of 15216055 is 55061251.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15216055 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15216059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79990 + ... + 80179.

It is an arithmetic number, because the mean of its divisors is an integer number (2402550).

Almost surely, 2^15216055 is an apocalyptic number.

15216055 is a deficient number, since it is larger than the sum of its proper divisors (4004345).

15216055 is a wasteful number, since it uses less digits than its factorization.

15216055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160193.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 15216055 is about 3900.7762048085. The cubic root of 15216055 is about 247.7996506677.

The spelling of 15216055 in words is "fifteen million, two hundred sixteen thousand, fifty-five".