10516221 has 24 divisors (see below), whose sum is σ = 16039296. Its totient is φ = 6626400.

The previous prime is 10516199. The next prime is 10516249. The reversal of 10516221 is 12261501.

10516221 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 10516221 - 2¹¹ = 10514173 is a prime.

It is a super-2 number, since 2×10516221² = 221181808241682, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 10516194 and 10516203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10516021) 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, 20656 + ... + 21158.

It is an arithmetic number, because the mean of its divisors is an integer number (668304).

Almost surely, 2^10516221 is an apocalyptic number.

It is an amenable number.

10516221 is a deficient number, since it is larger than the sum of its proper divisors (5523075).

10516221 is a wasteful number, since it uses less digits than its factorization.

10516221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 630 counting only the distinct ones).

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

The square root of 10516221 is about 3242.8723379128. The cubic root of 10516221 is about 219.0886611674.

Adding to 10516221 its reverse (12261501), we get a palindrome (22777722).

The spelling of 10516221 in words is "ten million, five hundred sixteen thousand, two hundred twenty-one".