15420226 has 8 divisors (see below), whose sum is σ = 23278140. Its totient is φ = 7660848.

The previous prime is 15420221. The next prime is 15420253. The reversal of 15420226 is 62202451.

15420226 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 14100025 + 1320201 = 3755^2 + 1149^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 15420197 and 15420206.

It is not an unprimeable number, because it can be changed into a prime (15420221) 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, 24241 + ... + 24868.

Almost surely, 2^15420226 is an apocalyptic number.

15420226 is a deficient number, since it is larger than the sum of its proper divisors (7857914).

15420226 is a wasteful number, since it uses less digits than its factorization.

15420226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49268.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 15420226 is about 3926.8595594953. The cubic root of 15420226 is about 248.9030659825.

Adding to 15420226 its reverse (62202451), we get a palindrome (77622677).

The spelling of 15420226 in words is "fifteen million, four hundred twenty thousand, two hundred twenty-six".