10221255 has 32 divisors (see below), whose sum is σ = 19825920. Its totient is φ = 4955040.

The previous prime is 10221247. The next prime is 10221283. The reversal of 10221255 is 55212201.

It is not a de Polignac number, because 10221255 - 2³ = 10221247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1957 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (619560).

Almost surely, 2^10221255 is an apocalyptic number.

10221255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10221255 is a deficient number, since it is larger than the sum of its proper divisors (9604665).

10221255 is a wasteful number, since it uses less digits than its factorization.

10221255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6908 (or 6902 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 10221255 is about 3197.0697521324. The cubic root of 10221255 is about 217.0208238138.

Adding to 10221255 its reverse (55212201), we get a palindrome (65433456).

The spelling of 10221255 in words is "ten million, two hundred twenty-one thousand, two hundred fifty-five".