135233181 has 12 divisors (see below), whose sum is σ = 206827452. Its totient is φ = 84852096.

The previous prime is 135233179. The next prime is 135233183. The reversal of 135233181 is 181332531.

It is an interprime number because it is at equal distance from previous prime (135233179) and next prime (135233183).

It can be written as a sum of positive squares in 2 ways, for example, as 73359225 + 61873956 = 8565^2 + 7866^2 .

It is not a de Polignac number, because 135233181 - 2¹ = 135233179 is a prime.

It is a super-2 number, since 2×135233181² = 36576026486757522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135233183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 441786 + ... + 442091.

It is an arithmetic number, because the mean of its divisors is an integer number (17235621).

Almost surely, 2^135233181 is an apocalyptic number.

It is an amenable number.

135233181 is a deficient number, since it is larger than the sum of its proper divisors (71594271).

135233181 is a wasteful number, since it uses less digits than its factorization.

135233181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883900 (or 883897 counting only the distinct ones).

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

The square root of 135233181 is about 11628.9802218423. The cubic root of 135233181 is about 513.2879725571.

The spelling of 135233181 in words is "one hundred thirty-five million, two hundred thirty-three thousand, one hundred eighty-one".