64822021 has 8 divisors (see below), whose sum is σ = 72049824. Its totient is φ = 57816720.

The previous prime is 64822013. The next prime is 64822067. The reversal of 64822021 is 12022846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64822021 - 2³ = 64822013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64822081) 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, 55011 + ... + 56176.

It is an arithmetic number, because the mean of its divisors is an integer number (9006228).

Almost surely, 2^64822021 is an apocalyptic number.

It is an amenable number.

64822021 is a deficient number, since it is larger than the sum of its proper divisors (7227803).

64822021 is a wasteful number, since it uses less digits than its factorization.

64822021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111251.

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

The square root of 64822021 is about 8051.2123931741. The cubic root of 64822021 is about 401.7052636093.

Adding to 64822021 its reverse (12022846), we get a palindrome (76844867).

The spelling of 64822021 in words is "sixty-four million, eight hundred twenty-two thousand, twenty-one".