135999232 has 36 divisors (see below), whose sum is σ = 280240576. Its totient is φ = 65802240.

The previous prime is 135999221. The next prime is 135999233. The reversal of 135999232 is 232999531.

It is a super-2 number, since 2×135999232² = 36991582209179648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135999233) 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, 633 + ... + 16504.

Almost surely, 2^135999232 is an apocalyptic number.

It is an amenable number.

135999232 is an abundant number, since it is smaller than the sum of its proper divisors (144241344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135999232 is an equidigital number, since it uses as much as digits as its factorization.

135999232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17184 (or 17170 counting only the distinct ones).

The product of its digits is 131220, while the sum is 43.

The square root of 135999232 is about 11661.8708619158. The cubic root of 135999232 is about 514.2553501179.

The spelling of 135999232 in words is "one hundred thirty-five million, nine hundred ninety-nine thousand, two hundred thirty-two".