15220873 has 4 divisors (see below), whose sum is σ = 15276100. Its totient is φ = 15165648.

The previous prime is 15220867. The next prime is 15220883. The reversal of 15220873 is 37802251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3640464 + 11580409 = 1908^2 + 3403^2 .

It is a cyclic number.

It is not a de Polignac number, because 15220873 - 2⁵ = 15220841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15220883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27198 + ... + 27751.

It is an arithmetic number, because the mean of its divisors is an integer number (3819025).

Almost surely, 2^15220873 is an apocalyptic number.

It is an amenable number.

15220873 is a deficient number, since it is larger than the sum of its proper divisors (55227).

15220873 is an equidigital number, since it uses as much as digits as its factorization.

15220873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55226.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 15220873 is about 3901.3937253243. The cubic root of 15220873 is about 247.8258022715.

It can be divided in two parts, 152 and 20873, that added together give a square (21025 = 145²).

The spelling of 15220873 in words is "fifteen million, two hundred twenty thousand, eight hundred seventy-three".