2226212561 has 4 divisors (see below), whose sum is σ = 2226691824. Its totient is φ = 2225733300.

The previous prime is 2226212537. The next prime is 2226212627. The reversal of 2226212561 is 1652126222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2226212561 - 2¹⁴ = 2226196177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2226272561) 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, 232595 + ... + 241976.

It is an arithmetic number, because the mean of its divisors is an integer number (556672956).

Almost surely, 2^2226212561 is an apocalyptic number.

It is an amenable number.

2226212561 is a deficient number, since it is larger than the sum of its proper divisors (479263).

2226212561 is an equidigital number, since it uses as much as digits as its factorization.

2226212561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479262.

The product of its digits is 5760, while the sum is 29.

The square root of 2226212561 is about 47182.7570305085. The cubic root of 2226212561 is about 1305.7364957459.

Adding to 2226212561 its reverse (1652126222), we get a palindrome (3878338783).

The spelling of 2226212561 in words is "two billion, two hundred twenty-six million, two hundred twelve thousand, five hundred sixty-one".