204501157 has 6 divisors (see below), whose sum is σ = 237889158. Its totient is φ = 175286664.

The previous prime is 204501149. The next prime is 204501179. The reversal of 204501157 is 751105402.

It can be written as a sum of positive squares in only one way, i.e., 164634561 + 39866596 = 12831^2 + 6314^2 .

It is not a de Polignac number, because 204501157 - 2³ = 204501149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204501107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2086698 + ... + 2086795.

It is an arithmetic number, because the mean of its divisors is an integer number (39648193).

Almost surely, 2^204501157 is an apocalyptic number.

It is an amenable number.

204501157 is a deficient number, since it is larger than the sum of its proper divisors (33388001).

204501157 is an equidigital number, since it uses as much as digits as its factorization.

204501157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173507 (or 4173500 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 204501157 is about 14300.3900995742. The cubic root of 204501157 is about 589.1581952621.

Adding to 204501157 its reverse (751105402), we get a palindrome (955606559).

The spelling of 204501157 in words is "two hundred four million, five hundred one thousand, one hundred fifty-seven".