205187401 has 4 divisors (see below), whose sum is σ = 205675204. Its totient is φ = 204699600.

The previous prime is 205187387. The next prime is 205187413. The reversal of 205187401 is 104781502.

205187401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90269001 + 114918400 = 9501^2 + 10720^2 .

It is a cyclic number.

It is not a de Polignac number, because 205187401 - 2⁵ = 205187369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205187401.

It is not an unprimeable number, because it can be changed into a prime (205187431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243270 + ... + 244111.

It is an arithmetic number, because the mean of its divisors is an integer number (51418801).

Almost surely, 2^205187401 is an apocalyptic number.

It is an amenable number.

205187401 is a deficient number, since it is larger than the sum of its proper divisors (487803).

205187401 is an equidigital number, since it uses as much as digits as its factorization.

205187401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487802.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 205187401 is about 14324.3638951264. The cubic root of 205187401 is about 589.8164716920.

The spelling of 205187401 in words is "two hundred five million, one hundred eighty-seven thousand, four hundred one".