135221151 has 16 divisors (see below), whose sum is σ = 194880224. Its totient is φ = 82905984.

The previous prime is 135221147. The next prime is 135221153. The reversal of 135221151 is 151122531.

It is not a de Polignac number, because 135221151 - 2² = 135221147 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 (135221153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4545 + ... + 17061.

It is an arithmetic number, because the mean of its divisors is an integer number (12180014).

Almost surely, 2^135221151 is an apocalyptic number.

135221151 is a deficient number, since it is larger than the sum of its proper divisors (59659073).

135221151 is a wasteful number, since it uses less digits than its factorization.

135221151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12810.

The product of its digits is 300, while the sum is 21.

The square root of 135221151 is about 11628.4629680797. The cubic root of 135221151 is about 513.2727518414.

Adding to 135221151 its reverse (151122531), we get a palindrome (286343682).

The spelling of 135221151 in words is "one hundred thirty-five million, two hundred twenty-one thousand, one hundred fifty-one".