2204665261 has 4 divisors (see below), whose sum is σ = 2210218972. Its totient is φ = 2199111552.

The previous prime is 2204665249. The next prime is 2204665273. The reversal of 2204665261 is 1625664022.

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

It is an interprime number because it is at equal distance from previous prime (2204665249) and next prime (2204665273).

It can be written as a sum of positive squares in 2 ways, for example, as 1762404361 + 442260900 = 41981^2 + 21030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204665261 - 2¹³ = 2204657069 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 (2204665241) 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, 2776260 + ... + 2777053.

It is an arithmetic number, because the mean of its divisors is an integer number (552554743).

Almost surely, 2^2204665261 is an apocalyptic number.

It is an amenable number.

2204665261 is a deficient number, since it is larger than the sum of its proper divisors (5553711).

2204665261 is an equidigital number, since it uses as much as digits as its factorization.

2204665261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553710.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2204665261 is about 46953.8631105045. The cubic root of 2204665261 is about 1301.5101308924.

The spelling of 2204665261 in words is "two billion, two hundred four million, six hundred sixty-five thousand, two hundred sixty-one".