135212351 has 4 divisors (see below), whose sum is σ = 135324672. Its totient is φ = 135100032.

The previous prime is 135212347. The next prime is 135212411. The reversal of 135212351 is 153212531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135212351 - 2² = 135212347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135212321) 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, 54335 + ... + 56768.

It is an arithmetic number, because the mean of its divisors is an integer number (33831168).

Almost surely, 2^135212351 is an apocalyptic number.

135212351 is a deficient number, since it is larger than the sum of its proper divisors (112321).

135212351 is a wasteful number, since it uses less digits than its factorization.

135212351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112320.

The product of its digits is 900, while the sum is 23.

The square root of 135212351 is about 11628.0845800157. The cubic root of 135212351 is about 513.2616172465.

Adding to 135212351 its reverse (153212531), we get a palindrome (288424882).

The spelling of 135212351 in words is "one hundred thirty-five million, two hundred twelve thousand, three hundred fifty-one".