135205751 has 2 divisors, whose sum is σ = 135205752. Its totient is φ = 135205750.

The previous prime is 135205747. The next prime is 135205781. The reversal of 135205751 is 157502531.

It is a happy number.

135205751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135205751 - 2² = 135205747 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135205781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67602875 + 67602876.

It is an arithmetic number, because the mean of its divisors is an integer number (67602876).

Almost surely, 2^135205751 is an apocalyptic number.

135205751 is a deficient number, since it is larger than the sum of its proper divisors (1).

135205751 is an equidigital number, since it uses as much as digits as its factorization.

135205751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 135205751 is about 11627.8007808872. The cubic root of 135205751 is about 513.2532659833.

The spelling of 135205751 in words is "one hundred thirty-five million, two hundred five thousand, seven hundred fifty-one".