10221651 has 24 divisors (see below), whose sum is σ = 16214016. Its totient is φ = 6153840.

The previous prime is 10221649. The next prime is 10221671. The reversal of 10221651 is 15612201.

10221651 is a `hidden beast` number, since 10 + 2 + 2 + 1 + 651 = 666.

It is not a de Polignac number, because 10221651 - 2¹ = 10221649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10221671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21846 + ... + 22308.

It is an arithmetic number, because the mean of its divisors is an integer number (675584).

Almost surely, 2^10221651 is an apocalyptic number.

10221651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10221651 is a deficient number, since it is larger than the sum of its proper divisors (5992365).

10221651 is a wasteful number, since it uses less digits than its factorization.

10221651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 10221651 is about 3197.1316832436. The cubic root of 10221651 is about 217.0236264421.

Adding to 10221651 its reverse (15612201), we get a palindrome (25833852).

The spelling of 10221651 in words is "ten million, two hundred twenty-one thousand, six hundred fifty-one".