135604231 has 8 divisors (see below), whose sum is σ = 155238944. Its totient is φ = 116035200.

The previous prime is 135604229. The next prime is 135604247. The reversal of 135604231 is 132406531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135604231 - 2¹ = 135604229 is a prime.

It is a super-2 number, since 2×135604231² = 36777014930202722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135604196 and 135604205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135604031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11910 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (19404868).

Almost surely, 2^135604231 is an apocalyptic number.

135604231 is a deficient number, since it is larger than the sum of its proper divisors (19634713).

135604231 is an equidigital number, since it uses as much as digits as its factorization.

135604231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32841.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 135604231 is about 11644.9229709775. The cubic root of 135604231 is about 513.7569934896.

The spelling of 135604231 in words is "one hundred thirty-five million, six hundred four thousand, two hundred thirty-one".