135214231 has 8 divisors (see below), whose sum is σ = 138522384. Its totient is φ = 131913600.

The previous prime is 135214223. The next prime is 135214237. The reversal of 135214231 is 132412531.

It is a happy number.

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 135214231 - 2³ = 135214223 is a prime.

It is a super-2 number, since 2×135214231² = 36565776529842722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135214237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54735 + ... + 57151.

It is an arithmetic number, because the mean of its divisors is an integer number (17315298).

Almost surely, 2^135214231 is an apocalyptic number.

135214231 is a deficient number, since it is larger than the sum of its proper divisors (3308153).

135214231 is a wasteful number, since it uses less digits than its factorization.

135214231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761.

The product of its digits is 720, while the sum is 22.

The square root of 135214231 is about 11628.1654185000. The cubic root of 135214231 is about 513.2639960414.

Adding to 135214231 its reverse (132412531), we get a palindrome (267626762).

The spelling of 135214231 in words is "one hundred thirty-five million, two hundred fourteen thousand, two hundred thirty-one".