64154221 has 8 divisors (see below), whose sum is σ = 67474944. Its totient is φ = 60911760.

The previous prime is 64154191. The next prime is 64154231. The reversal of 64154221 is 12245146.

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 64154221 - 2⁷ = 64154093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64154231) 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, 17881 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (8434368).

Almost surely, 2^64154221 is an apocalyptic number.

It is an amenable number.

64154221 is a deficient number, since it is larger than the sum of its proper divisors (3320723).

64154221 is a wasteful number, since it uses less digits than its factorization.

64154221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39131.

The product of its digits is 1920, while the sum is 25.

The square root of 64154221 is about 8009.6330128165. The cubic root of 64154221 is about 400.3210360208.

Adding to 64154221 its reverse (12245146), we get a palindrome (76399367).

The spelling of 64154221 in words is "sixty-four million, one hundred fifty-four thousand, two hundred twenty-one".