64221936 has 40 divisors (see below), whose sum is σ = 170395344. Its totient is φ = 20828160.

The previous prime is 64221931. The next prime is 64221943. The reversal of 64221936 is 63912246.

It is a junction number, because it is equal to n+sod(n) for n = 64221897 and 64221906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64221931) 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, 16305 + ... + 19856.

Almost surely, 2^64221936 is an apocalyptic number.

It is an amenable number.

64221936 is an abundant number, since it is smaller than the sum of its proper divisors (106173408).

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

64221936 is a wasteful number, since it uses less digits than its factorization.

64221936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36209 (or 36203 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 64221936 is about 8013.8589955152. The cubic root of 64221936 is about 400.4618332366.

It can be divided in two parts, 642 and 21936, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 64221936 in words is "sixty-four million, two hundred twenty-one thousand, nine hundred thirty-six".