15228887 has 2 divisors, whose sum is σ = 15228888. Its totient is φ = 15228886.

The previous prime is 15228883. The next prime is 15228907. The reversal of 15228887 is 78882251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15228887 - 2² = 15228883 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15228883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7614443 + 7614444.

It is an arithmetic number, because the mean of its divisors is an integer number (7614444).

Almost surely, 2^15228887 is an apocalyptic number.

15228887 is a deficient number, since it is larger than the sum of its proper divisors (1).

15228887 is an equidigital number, since it uses as much as digits as its factorization.

15228887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 41.

The square root of 15228887 is about 3902.4206590269. The cubic root of 15228887 is about 247.8692892103.

The spelling of 15228887 in words is "fifteen million, two hundred twenty-eight thousand, eight hundred eighty-seven".