205136401 has 8 divisors (see below), whose sum is σ = 212515200. Its totient is φ = 197778000.

The previous prime is 205136387. The next prime is 205136411. The reversal of 205136401 is 104631502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205136401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205136411) 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, 17070 + ... + 26488.

It is an arithmetic number, because the mean of its divisors is an integer number (26564400).

Almost surely, 2^205136401 is an apocalyptic number.

It is an amenable number.

205136401 is a deficient number, since it is larger than the sum of its proper divisors (7378799).

205136401 is an equidigital number, since it uses as much as digits as its factorization.

205136401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10199.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 205136401 is about 14322.5836007335. The cubic root of 205136401 is about 589.7676007046.

Adding to 205136401 its reverse (104631502), we get a palindrome (309767903).

The spelling of 205136401 in words is "two hundred five million, one hundred thirty-six thousand, four hundred one".