135206550 has 48 divisors (see below), whose sum is σ = 372572880. Its totient is φ = 36054720.

The previous prime is 135206521. The next prime is 135206557. The reversal of 135206550 is 55602531.

135206550 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 0 + 655 + 0 = 666.

It is a super-2 number, since 2×135206550² = 36561622325805000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135206557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48727 + ... + 51426.

It is an arithmetic number, because the mean of its divisors is an integer number (7761935).

Almost surely, 2^135206550 is an apocalyptic number.

135206550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135206550 is an abundant number, since it is smaller than the sum of its proper divisors (237366330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135206550 is a wasteful number, since it uses less digits than its factorization.

135206550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100174 (or 100163 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 135206550 is about 11627.8351381502. The cubic root of 135206550 is about 513.2542770067.

The spelling of 135206550 in words is "one hundred thirty-five million, two hundred six thousand, five hundred fifty".