135022257 has 6 divisors (see below), whose sum is σ = 195032162. Its totient is φ = 90014832.

The previous prime is 135022247. The next prime is 135022301. The reversal of 135022257 is 752220531.

It can be written as a sum of positive squares in only one way, i.e., 122744241 + 12278016 = 11079^2 + 3504^2 .

It is not a de Polignac number, because 135022257 - 2⁴ = 135022241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135022257.

It is not an unprimeable number, because it can be changed into a prime (135022207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7501228 + ... + 7501245.

Almost surely, 2^135022257 is an apocalyptic number.

It is an amenable number.

135022257 is a deficient number, since it is larger than the sum of its proper divisors (60009905).

135022257 is a wasteful number, since it uses less digits than its factorization.

135022257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15002479 (or 15002476 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 135022257 is about 11619.9077879302. The cubic root of 135022257 is about 513.0209742573.

Adding to 135022257 its reverse (752220531), we get a palindrome (887242788).

The spelling of 135022257 in words is "one hundred thirty-five million, twenty-two thousand, two hundred fifty-seven".