10221915 has 32 divisors (see below), whose sum is σ = 18289152. Its totient is φ = 4832000.

The previous prime is 10221901. The next prime is 10221919. The reversal of 10221915 is 51912201.

10221915 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10221915 - 2⁴ = 10221899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10221891 and 10221900.

It is not an unprimeable number, because it can be changed into a prime (10221919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6010 + ... + 7520.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^10221915 is an apocalyptic number.

10221915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10221915 is a deficient number, since it is larger than the sum of its proper divisors (8067237).

10221915 is a wasteful number, since it uses less digits than its factorization.

10221915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 10221915 is about 3197.1729699846. The cubic root of 10221915 is about 217.0254948207.

The spelling of 10221915 in words is "ten million, two hundred twenty-one thousand, nine hundred fifteen".