2221222461 has 4 divisors (see below), whose sum is σ = 2961629952. Its totient is φ = 1480814972.

The previous prime is 2221222459. The next prime is 2221222481. The reversal of 2221222461 is 1642221222.

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 2221222461 - 2¹ = 2221222459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221222441) 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, 370203741 + ... + 370203746.

It is an arithmetic number, because the mean of its divisors is an integer number (740407488).

Almost surely, 2^2221222461 is an apocalyptic number.

It is an amenable number.

2221222461 is a deficient number, since it is larger than the sum of its proper divisors (740407491).

2221222461 is an equidigital number, since it uses as much as digits as its factorization.

2221222461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740407490.

The product of its digits is 1536, while the sum is 24.

The square root of 2221222461 is about 47129.8468170649. The cubic root of 2221222461 is about 1304.7601543919.

Adding to 2221222461 its reverse (1642221222), we get a palindrome (3863443683).

The spelling of 2221222461 in words is "two billion, two hundred twenty-one million, two hundred twenty-two thousand, four hundred sixty-one".