205042051 has 8 divisors (see below), whose sum is σ = 211161600. Its totient is φ = 199010760.

The previous prime is 205042039. The next prime is 205042069. The reversal of 205042051 is 150240502.

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 205042051 - 2¹⁵ = 205009283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205042021) 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, 17335 + ... + 26656.

It is an arithmetic number, because the mean of its divisors is an integer number (26395200).

Almost surely, 2^205042051 is an apocalyptic number.

205042051 is a deficient number, since it is larger than the sum of its proper divisors (6119549).

205042051 is an equidigital number, since it uses as much as digits as its factorization.

205042051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44129.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 205042051 is about 14319.2894725960. The cubic root of 205042051 is about 589.6771680201.

Adding to 205042051 its reverse (150240502), we get a palindrome (355282553).

The spelling of 205042051 in words is "two hundred five million, forty-two thousand, fifty-one".