2227638965 has 4 divisors (see below), whose sum is σ = 2673166764. Its totient is φ = 1782111168.

The previous prime is 2227638961. The next prime is 2227638977. The reversal of 2227638965 is 5698367222.

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 1213407556 + 1014231409 = 34834^2 + 31847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2227638965 - 2² = 2227638961 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 (2227638961) 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, 222763892 + ... + 222763901.

It is an arithmetic number, because the mean of its divisors is an integer number (668291691).

Almost surely, 2^2227638965 is an apocalyptic number.

It is an amenable number.

2227638965 is a deficient number, since it is larger than the sum of its proper divisors (445527799).

2227638965 is an equidigital number, since it uses as much as digits as its factorization.

2227638965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445527798.

The product of its digits is 2177280, while the sum is 50.

The square root of 2227638965 is about 47197.8703439043. The cubic root of 2227638965 is about 1306.0153116064.

The spelling of 2227638965 in words is "two billion, two hundred twenty-seven million, six hundred thirty-eight thousand, nine hundred sixty-five".