135690231 has 8 divisors (see below), whose sum is σ = 182611584. Its totient is φ = 89614520.

The previous prime is 135690227. The next prime is 135690253. The reversal of 135690231 is 132096531.

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 135690231 - 2² = 135690227 is a prime.

It is a super-2 number, since 2×135690231² = 36823677577666722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135690221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211035 + ... + 211676.

It is an arithmetic number, because the mean of its divisors is an integer number (22826448).

Almost surely, 2^135690231 is an apocalyptic number.

135690231 is a deficient number, since it is larger than the sum of its proper divisors (46921353).

135690231 is a wasteful number, since it uses less digits than its factorization.

135690231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422821.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 135690231 is about 11648.6149820483. The cubic root of 135690231 is about 513.8655785097.

The spelling of 135690231 in words is "one hundred thirty-five million, six hundred ninety thousand, two hundred thirty-one".