205145401 has 4 divisors (see below), whose sum is σ = 205190272. Its totient is φ = 205100532.

The previous prime is 205145399. The next prime is 205145407. The reversal of 205145401 is 104541502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205145401 - 2¹ = 205145399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205145407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14685 + ... + 25018.

It is an arithmetic number, because the mean of its divisors is an integer number (51297568).

Almost surely, 2^205145401 is an apocalyptic number.

It is an amenable number.

205145401 is a deficient number, since it is larger than the sum of its proper divisors (44871).

205145401 is an equidigital number, since it uses as much as digits as its factorization.

205145401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44870.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 205145401 is about 14322.8977864118. The cubic root of 205145401 is about 589.7762255851.

Adding to 205145401 its reverse (104541502), we get a palindrome (309686903).

The spelling of 205145401 in words is "two hundred five million, one hundred forty-five thousand, four hundred one".