135244220 has 24 divisors (see below), whose sum is σ = 286062000. Its totient is φ = 53707392.

The previous prime is 135244217. The next prime is 135244229. The reversal of 135244220 is 22442531.

It is a happy number.

135244220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135244229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21545 + ... + 27104.

It is an arithmetic number, because the mean of its divisors is an integer number (11919250).

Almost surely, 2^135244220 is an apocalyptic number.

135244220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135244220 is an abundant number, since it is smaller than the sum of its proper divisors (150817780).

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

135244220 is a wasteful number, since it uses less digits than its factorization.

135244220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48797 (or 48795 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 135244220 is about 11629.4548453485. The cubic root of 135244220 is about 513.3019386358.

Adding to 135244220 its reverse (22442531), we get a palindrome (157686751).

The spelling of 135244220 in words is "one hundred thirty-five million, two hundred forty-four thousand, two hundred twenty".