135533686201 has 3 divisors (see below), whose sum is σ = 135534054351. Its totient is φ = 135533318052.

The previous prime is 135533686187. The next prime is 135533686273. The reversal of 135533686201 is 102686335531.

It is a happy number.

The square root of 135533686201 is 368149.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 102686335531 = 13 ⋅7898948887.

It can be written as a sum of positive squares in only one way, i.e., 1357996201 + 134175690000 = 36851^2 + 366300^2 .

It is not a de Polignac number, because 135533686201 - 2¹³ = 135533678009 is a prime.

It is a super-2 number, since 2×135533686201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135533636201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 184075 + ... + 552223.

It is an arithmetic number, because the mean of its divisors is an integer number (45178018117).

Almost surely, 2^135533686201 is an apocalyptic number.

135533686201 is the 368149-th square number.

135533686201 is the 184075-th centered octagonal number.

It is an amenable number.

135533686201 is a deficient number, since it is larger than the sum of its proper divisors (368150).

135533686201 is an frugal number, since it uses more digits than its factorization.

135533686201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736298 (or 368149 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 135533686201 in words is "one hundred thirty-five billion, five hundred thirty-three million, six hundred eighty-six thousand, two hundred one".