15220049 has 16 divisors (see below), whose sum is σ = 17655120. Its totient is φ = 12994560.

The previous prime is 15220031. The next prime is 15220067. The reversal of 15220049 is 94002251.

15220049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15220031) and next prime (15220067).

It can be written as a sum of positive squares in 8 ways, for example, as 4774225 + 10445824 = 2185^2 + 3232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15220049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15220069) 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, 12917 + ... + 14045.

It is an arithmetic number, because the mean of its divisors is an integer number (1103445).

Almost surely, 2^15220049 is an apocalyptic number.

It is an amenable number.

15220049 is a deficient number, since it is larger than the sum of its proper divisors (2435071).

15220049 is a wasteful number, since it uses less digits than its factorization.

15220049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15220049 is about 3901.2881206084. The cubic root of 15220049 is about 247.8213300763.

The spelling of 15220049 in words is "fifteen million, two hundred twenty thousand, forty-nine".