135823311 has 20 divisors (see below), whose sum is σ = 218505672. Its totient is φ = 83582928.

The previous prime is 135823297. The next prime is 135823313. The reversal of 135823311 is 113328531.

It is not a de Polignac number, because 135823311 - 2¹¹ = 135821263 is a prime.

It is a super-2 number, since 2×135823311² = 36895943622005442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135823313) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63441 + ... + 65546.

Almost surely, 2^135823311 is an apocalyptic number.

135823311 is a deficient number, since it is larger than the sum of its proper divisors (82682361).

135823311 is a wasteful number, since it uses less digits than its factorization.

135823311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129012 (or 129003 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 135823311 is about 11654.3258492287. The cubic root of 135823311 is about 514.0335171207.

The spelling of 135823311 in words is "one hundred thirty-five million, eight hundred twenty-three thousand, three hundred eleven".