64222081 has 32 divisors (see below), whose sum is σ = 82780416. Its totient is φ = 48787200.

The previous prime is 64222063. The next prime is 64222087. The reversal of 64222081 is 18022246.

It is a happy number.

It is not a de Polignac number, because 64222081 - 2⁷ = 64221953 is a prime.

It is a super-2 number, since 2×64222081² = 8248951375941122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64222087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 568281 + ... + 568393.

It is an arithmetic number, because the mean of its divisors is an integer number (2586888).

Almost surely, 2^64222081 is an apocalyptic number.

64222081 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

64222081 is a deficient number, since it is larger than the sum of its proper divisors (18558335).

64222081 is a wasteful number, since it uses less digits than its factorization.

64222081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 64222081 is about 8013.8680423376. The cubic root of 64222081 is about 400.4621346234.

The spelling of 64222081 in words is "sixty-four million, two hundred twenty-two thousand, eighty-one".