205522135501 has 8 divisors (see below), whose sum is σ = 209642843520. Its totient is φ = 201439406688.

The previous prime is 205522135457. The next prime is 205522135523. The reversal of 205522135501 is 105531225502.

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 205522135501 - 2³³ = 196932200909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205522133501) 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, 9483871 + ... + 9505516.

It is an arithmetic number, because the mean of its divisors is an integer number (26205355440).

Almost surely, 2^205522135501 is an apocalyptic number.

It is an amenable number.

205522135501 is a deficient number, since it is larger than the sum of its proper divisors (4120708019).

205522135501 is a wasteful number, since it uses less digits than its factorization.

205522135501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18989603.

The product of its (nonzero) digits is 15000, while the sum is 31.

Subtracting from 205522135501 its reverse (105531225502), we obtain a palindrome (99990909999).

The spelling of 205522135501 in words is "two hundred five billion, five hundred twenty-two million, one hundred thirty-five thousand, five hundred one".