135422321 has 4 divisors (see below), whose sum is σ = 141310272. Its totient is φ = 129534372.

The previous prime is 135422317. The next prime is 135422333. The reversal of 135422321 is 123224531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123224531 = 1789 ⋅68879.

It is a cyclic number.

It is not a de Polignac number, because 135422321 - 2² = 135422317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5887927 = 135422321 / (1 + 3 + 5 + 4 + 2 + 2 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135422621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2943941 + ... + 2943986.

It is an arithmetic number, because the mean of its divisors is an integer number (35327568).

Almost surely, 2^135422321 is an apocalyptic number.

It is an amenable number.

135422321 is a deficient number, since it is larger than the sum of its proper divisors (5887951).

135422321 is an equidigital number, since it uses as much as digits as its factorization.

135422321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5887950.

The product of its digits is 1440, while the sum is 23.

The square root of 135422321 is about 11637.1096497369. The cubic root of 135422321 is about 513.5271595688.

Adding to 135422321 its reverse (123224531), we get a palindrome (258646852).

The spelling of 135422321 in words is "one hundred thirty-five million, four hundred twenty-two thousand, three hundred twenty-one".