64140222 has 16 divisors (see below), whose sum is σ = 128815632. Its totient is φ = 21290880.

The previous prime is 64140211. The next prime is 64140227. The reversal of 64140222 is 22204146.

It is a super-2 number, since 2×64140222² = 8227936156418568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64140227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20733 + ... + 23624.

It is an arithmetic number, because the mean of its divisors is an integer number (8050977).

Almost surely, 2^64140222 is an apocalyptic number.

64140222 is an abundant number, since it is smaller than the sum of its proper divisors (64675410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64140222 is a wasteful number, since it uses less digits than its factorization.

64140222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44603.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 64140222 is about 8008.7590799074. The cubic root of 64140222 is about 400.2919160774.

Adding to 64140222 its reverse (22204146), we get a palindrome (86344368).

The spelling of 64140222 in words is "sixty-four million, one hundred forty thousand, two hundred twenty-two".