204122761 has 4 divisors (see below), whose sum is σ = 204161812. Its totient is φ = 204083712.

The previous prime is 204122741. The next prime is 204122773. The reversal of 204122761 is 167221402.

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 141015625 + 63107136 = 11875^2 + 7944^2 .

It is a cyclic number.

It is not a de Polignac number, because 204122761 - 2⁵ = 204122729 is a prime.

It is a super-2 number, since 2×204122761² = 83332203116526242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204122701) 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, 10200 + ... + 22633.

It is an arithmetic number, because the mean of its divisors is an integer number (51040453).

Almost surely, 2^204122761 is an apocalyptic number.

It is an amenable number.

204122761 is a deficient number, since it is larger than the sum of its proper divisors (39051).

204122761 is an equidigital number, since it uses as much as digits as its factorization.

204122761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39050.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 204122761 is about 14287.1537053396. The cubic root of 204122761 is about 588.7945905586.

The spelling of 204122761 in words is "two hundred four million, one hundred twenty-two thousand, seven hundred sixty-one".