135222917 has 6 divisors (see below), whose sum is σ = 138442662. Its totient is φ = 132076392.

The previous prime is 135222889. The next prime is 135222977. The reversal of 135222917 is 719222531.

It can be written as a sum of positive squares in only one way, i.e., 126922756 + 8300161 = 11266^2 + 2881^2 .

It is not a de Polignac number, because 135222917 - 2¹⁶ = 135157381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135222977) 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, 34718 + ... + 38415.

It is an arithmetic number, because the mean of its divisors is an integer number (23073777).

Almost surely, 2^135222917 is an apocalyptic number.

It is an amenable number.

135222917 is a deficient number, since it is larger than the sum of its proper divisors (3219745).

135222917 is an frugal number, since it uses more digits than its factorization.

135222917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73219 (or 73176 counting only the distinct ones).

The product of its digits is 7560, while the sum is 32.

The square root of 135222917 is about 11628.5389022009. The cubic root of 135222917 is about 513.2749862939.

The spelling of 135222917 in words is "one hundred thirty-five million, two hundred twenty-two thousand, nine hundred seventeen".