135305251 has 8 divisors (see below), whose sum is σ = 148619520. Its totient is φ = 122610312.

The previous prime is 135305239. The next prime is 135305257. The reversal of 135305251 is 152503531.

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 135305251 - 2²¹ = 133208099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135305257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154375 + ... + 155248.

It is an arithmetic number, because the mean of its divisors is an integer number (18577440).

Almost surely, 2^135305251 is an apocalyptic number.

135305251 is a deficient number, since it is larger than the sum of its proper divisors (13314269).

135305251 is a wasteful number, since it uses less digits than its factorization.

135305251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309665.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 135305251 is about 11632.0785330912. The cubic root of 135305251 is about 513.3791387791.

Adding to 135305251 its reverse (152503531), we get a palindrome (287808782).

It can be divided in two parts, 13530 and 5251, that added together give a palindrome (18781).

The spelling of 135305251 in words is "one hundred thirty-five million, three hundred five thousand, two hundred fifty-one".