2221567 has 2 divisors, whose sum is σ = 2221568. Its totient is φ = 2221566.

The previous prime is 2221523. The next prime is 2221589. The reversal of 2221567 is 7651222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221567 - 2¹⁵ = 2188799 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110783 + 1110784.

It is an arithmetic number, because the mean of its divisors is an integer number (1110784).

2^2221567 is an apocalyptic number.

2221567 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221567 is an equidigital number, since it uses as much as digits as its factorization.

2221567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 2221567 is about 1490.4922005834. The cubic root of 2221567 is about 130.4827612368.

Adding to 2221567 its reverse (7651222), we get a palindrome (9872789).

It can be divided in two parts, 22 and 21567, that multiplied together give a palindrome (474474).

The spelling of 2221567 in words is "two million, two hundred twenty-one thousand, five hundred sixty-seven".