22216461 has 4 divisors (see below), whose sum is σ = 29621952. Its totient is φ = 14810972.

The previous prime is 22216457. The next prime is 22216507. The reversal of 22216461 is 16461222.

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 22216461 - 2² = 22216457 is a prime.

It is a super-2 number, since 2×22216461² = 987142278729042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216451) 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, 3702741 + ... + 3702746.

It is an arithmetic number, because the mean of its divisors is an integer number (7405488).

Almost surely, 2^22216461 is an apocalyptic number.

It is an amenable number.

22216461 is a deficient number, since it is larger than the sum of its proper divisors (7405491).

22216461 is an equidigital number, since it uses as much as digits as its factorization.

22216461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7405490.

The product of its digits is 1152, while the sum is 24.

The square root of 22216461 is about 4713.4340984043. The cubic root of 22216461 is about 281.1199236523.

Adding to 22216461 its reverse (16461222), we get a palindrome (38677683).

The spelling of 22216461 in words is "twenty-two million, two hundred sixteen thousand, four hundred sixty-one".