15215155 has 8 divisors (see below), whose sum is σ = 18353952. Its totient is φ = 12108288.

The previous prime is 15215149. The next prime is 15215159. The reversal of 15215155 is 55151251.

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 15215155 - 2¹⁹ = 14690867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15215159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6919 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (2294244).

Almost surely, 2^15215155 is an apocalyptic number.

15215155 is a deficient number, since it is larger than the sum of its proper divisors (3138797).

15215155 is a wasteful number, since it uses less digits than its factorization.

15215155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15965.

The product of its digits is 1250, while the sum is 25.

The square root of 15215155 is about 3900.6608414473. The cubic root of 15215155 is about 247.7947649492.

The spelling of 15215155 in words is "fifteen million, two hundred fifteen thousand, one hundred fifty-five".