64221115 has 12 divisors (see below), whose sum is σ = 89647776. Its totient is φ = 44037168.

The previous prime is 64221103. The next prime is 64221127. The reversal of 64221115 is 51112246.

It is an interprime number because it is at equal distance from previous prime (64221103) and next prime (64221127).

It is not a de Polignac number, because 64221115 - 2¹³ = 64212923 is a prime.

It is a super-2 number, since 2×64221115² = 8248703223686450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130819 + ... + 131308.

It is an arithmetic number, because the mean of its divisors is an integer number (7470648).

Almost surely, 2^64221115 is an apocalyptic number.

64221115 is a deficient number, since it is larger than the sum of its proper divisors (25426661).

64221115 is a wasteful number, since it uses less digits than its factorization.

64221115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262146 (or 262139 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 64221115 is about 8013.8077715902. The cubic root of 64221115 is about 400.4601267555.

The spelling of 64221115 in words is "sixty-four million, two hundred twenty-one thousand, one hundred fifteen".