22251866 has 16 divisors (see below), whose sum is σ = 41080704. Its totient is φ = 8802864.

The previous prime is 22251863. The next prime is 22251877. The reversal of 22251866 is 66815222.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22251863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60950 + ... + 61313.

It is an arithmetic number, because the mean of its divisors is an integer number (2567544).

Almost surely, 2^22251866 is an apocalyptic number.

22251866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22251866 is a deficient number, since it is larger than the sum of its proper divisors (18828838).

22251866 is a wasteful number, since it uses less digits than its factorization.

22251866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122285.

The product of its digits is 11520, while the sum is 32.

The square root of 22251866 is about 4717.1883574858. The cubic root of 22251866 is about 281.2691788732.

The spelling of 22251866 in words is "twenty-two million, two hundred fifty-one thousand, eight hundred sixty-six".