135222210 has 88 divisors (see below), whose sum is σ = 366692220. Its totient is φ = 35901792.

The previous prime is 135222193. The next prime is 135222247. The reversal of 135222210 is 12222531.

It can be written as a sum of positive squares in 2 ways, for example, as 130439241 + 4782969 = 11421^2 + 2187^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 590376 + ... + 590604.

Almost surely, 2^135222210 is an apocalyptic number.

135222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183346110).

135222210 is an abundant number, since it is smaller than the sum of its proper divisors (231470010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135222210 is an frugal number, since it uses more digits than its factorization.

135222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 135222210 is about 11628.5085028132. The cubic root of 135222210 is about 513.2740917561.

Adding to 135222210 its reverse (12222531), we get a palindrome (147444741).

The spelling of 135222210 in words is "one hundred thirty-five million, two hundred twenty-two thousand, two hundred ten".