13640222 has 12 divisors (see below), whose sum is σ = 21735600. Its totient is φ = 6418656.

The previous prime is 13640213. The next prime is 13640257. The reversal of 13640222 is 22204631.

It is a junction number, because it is equal to n+sod(n) for n = 13640194 and 13640203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11222 + ... + 12377.

It is an arithmetic number, because the mean of its divisors is an integer number (1811300).

Almost surely, 2^13640222 is an apocalyptic number.

13640222 is a deficient number, since it is larger than the sum of its proper divisors (8095378).

13640222 is a wasteful number, since it uses less digits than its factorization.

13640222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23635 (or 23618 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 13640222 is about 3693.2671173366. The cubic root of 13640222 is about 238.9317218871.

Adding to 13640222 its reverse (22204631), we get a palindrome (35844853).

The spelling of 13640222 in words is "thirteen million, six hundred forty thousand, two hundred twenty-two".