135520244 has 12 divisors (see below), whose sum is σ = 237264804. Its totient is φ = 67730304.

The previous prime is 135520237. The next prime is 135520267. The reversal of 135520244 is 442025531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71199844 + 64320400 = 8438^2 + 8020^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5132 + ... + 17244.

It is an arithmetic number, because the mean of its divisors is an integer number (19772067).

Almost surely, 2^135520244 is an apocalyptic number.

It is an amenable number.

135520244 is a deficient number, since it is larger than the sum of its proper divisors (101744560).

135520244 is a wasteful number, since it uses less digits than its factorization.

135520244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14914 (or 14912 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 135520244 is about 11641.3162486035. The cubic root of 135520244 is about 513.6509057972.

Adding to 135520244 its reverse (442025531), we get a palindrome (577545775).

The spelling of 135520244 in words is "one hundred thirty-five million, five hundred twenty thousand, two hundred forty-four".