135223811 has 4 divisors (see below), whose sum is σ = 137515800. Its totient is φ = 132931824.

The previous prime is 135223807. The next prime is 135223819. The reversal of 135223811 is 118322531.

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 135223811 - 2² = 135223807 is a prime.

It is a super-2 number, since 2×135223811² = 36570958122727442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135223819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145906 + ... + 1146023.

It is an arithmetic number, because the mean of its divisors is an integer number (34378950).

Almost surely, 2^135223811 is an apocalyptic number.

135223811 is a deficient number, since it is larger than the sum of its proper divisors (2291989).

135223811 is an equidigital number, since it uses as much as digits as its factorization.

135223811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291988.

The product of its digits is 1440, while the sum is 26.

The square root of 135223811 is about 11628.5773420483. The cubic root of 135223811 is about 513.2761174306.

The spelling of 135223811 in words is "one hundred thirty-five million, two hundred twenty-three thousand, eight hundred eleven".