15820226 has 8 divisors (see below), whose sum is σ = 23940684. Its totient is φ = 7840000.

The previous prime is 15820223. The next prime is 15820249. The reversal of 15820226 is 62202851.

15820226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15594601 + 225625 = 3949^2 + 475^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×15820226³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15820195 and 15820204.

It is not an unprimeable number, because it can be changed into a prime (15820223) 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, 34775 + ... + 35226.

Almost surely, 2^15820226 is an apocalyptic number.

15820226 is a deficient number, since it is larger than the sum of its proper divisors (8120458).

15820226 is a wasteful number, since it uses less digits than its factorization.

15820226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70116.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 15820226 is about 3977.4647704285. The cubic root of 15820226 is about 251.0368987515.

The spelling of 15820226 in words is "fifteen million, eight hundred twenty thousand, two hundred twenty-six".