15098221 has 4 divisors (see below), whose sum is σ = 15310944. Its totient is φ = 14885500.

The previous prime is 15098207. The next prime is 15098231. The reversal of 15098221 is 12289051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15098221 - 2⁷ = 15098093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15098221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15098231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106255 + ... + 106396.

It is an arithmetic number, because the mean of its divisors is an integer number (3827736).

Almost surely, 2^15098221 is an apocalyptic number.

It is an amenable number.

15098221 is a deficient number, since it is larger than the sum of its proper divisors (212723).

15098221 is an equidigital number, since it uses as much as digits as its factorization.

15098221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212722.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15098221 is about 3885.6429326432. The cubic root of 15098221 is about 247.1583341222.

It can be divided in two parts, 1509 and 8221, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 15098221 in words is "fifteen million, ninety-eight thousand, two hundred twenty-one".