135142219 has 4 divisors (see below), whose sum is σ = 136852960. Its totient is φ = 133431480.

The previous prime is 135142207. The next prime is 135142229. The reversal of 135142219 is 912241531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135142219 - 2¹⁷ = 135011147 is a prime.

It is a super-2 number, since 2×135142219² = 36526838712487922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135142229) 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, 855252 + ... + 855409.

It is an arithmetic number, because the mean of its divisors is an integer number (34213240).

Almost surely, 2^135142219 is an apocalyptic number.

135142219 is a deficient number, since it is larger than the sum of its proper divisors (1710741).

135142219 is an equidigital number, since it uses as much as digits as its factorization.

135142219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710740.

The product of its digits is 2160, while the sum is 28.

The square root of 135142219 is about 11625.0685589376. The cubic root of 135142219 is about 513.1728623146.

The spelling of 135142219 in words is "one hundred thirty-five million, one hundred forty-two thousand, two hundred nineteen".