64221345 has 12 divisors (see below), whose sum is σ = 111317076. Its totient is φ = 34251360.

The previous prime is 64221343. The next prime is 64221361. The reversal of 64221345 is 54312246.

64221345 is a `hidden beast` number, since 642 + 2 + 13 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27751824 + 36469521 = 5268^2 + 6039^2 .

It is not a de Polignac number, because 64221345 - 2¹ = 64221343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64221343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713526 + ... + 713615.

It is an arithmetic number, because the mean of its divisors is an integer number (9276423).

Almost surely, 2^64221345 is an apocalyptic number.

It is an amenable number.

64221345 is a deficient number, since it is larger than the sum of its proper divisors (47095731).

64221345 is a wasteful number, since it uses less digits than its factorization.

64221345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427152 (or 1427149 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 64221345 is about 8013.8221218093. The cubic root of 64221345 is about 400.4606048211.

Subtracting from 64221345 its reverse (54312246), we obtain a palindrome (9909099).

The spelling of 64221345 in words is "sixty-four million, two hundred twenty-one thousand, three hundred forty-five".