135505250253 has 12 divisors (see below), whose sum is σ = 195787198620. Its totient is φ = 90310344576.

The previous prime is 135505250249. The next prime is 135505250269. The reversal of 135505250253 is 352052505531.

135505250253 is a `hidden beast` number, since 1 + 3 + 5 + 50 + 52 + 502 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 90226942884 + 45278307369 = 300378^2 + 212787^2 .

It is not a de Polignac number, because 135505250253 - 2² = 135505250249 is a prime.

It is a super-2 number, since 2×135505250253² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135505250653) 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, 2174988 + ... + 2236421.

It is an arithmetic number, because the mean of its divisors is an integer number (16315599885).

Almost surely, 2^135505250253 is an apocalyptic number.

It is an amenable number.

135505250253 is a deficient number, since it is larger than the sum of its proper divisors (60281948367).

135505250253 is a wasteful number, since it uses less digits than its factorization.

135505250253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414828 (or 4414825 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 36.

Adding to 135505250253 its reverse (352052505531), we get a palindrome (487557755784).

The spelling of 135505250253 in words is "one hundred thirty-five billion, five hundred five million, two hundred fifty thousand, two hundred fifty-three".