135206263 has 12 divisors (see below), whose sum is σ = 139789552. Its totient is φ = 130757760.

The previous prime is 135206257. The next prime is 135206327. The reversal of 135206263 is 362602531.

135206263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135206263 - 2⁹ = 135205751 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 (135206063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213958 + ... + 214588.

Almost surely, 2^135206263 is an apocalyptic number.

135206263 is a deficient number, since it is larger than the sum of its proper divisors (4583289).

135206263 is an frugal number, since it uses more digits than its factorization.

135206263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 135206263 is about 11627.8227970674. The cubic root of 135206263 is about 513.2539138486.

Adding to 135206263 its reverse (362602531), we get a palindrome (497808794).

The spelling of 135206263 in words is "one hundred thirty-five million, two hundred six thousand, two hundred sixty-three".