10221851 has 4 divisors (see below), whose sum is σ = 10230000. Its totient is φ = 10213704.

The previous prime is 10221803. The next prime is 10221853. The reversal of 10221851 is 15812201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10221851 - 2¹⁰ = 10220827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10221853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751 + ... + 4848.

It is an arithmetic number, because the mean of its divisors is an integer number (2557500).

Almost surely, 2^10221851 is an apocalyptic number.

10221851 is a deficient number, since it is larger than the sum of its proper divisors (8149).

10221851 is an equidigital number, since it uses as much as digits as its factorization.

10221851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 10221851 is about 3197.1629611266. The cubic root of 10221851 is about 217.0250418834.

The spelling of 10221851 in words is "ten million, two hundred twenty-one thousand, eight hundred fifty-one".