10618221 has 16 divisors (see below), whose sum is σ = 14616000. Its totient is φ = 6852480.

The previous prime is 10618211. The next prime is 10618247. The reversal of 10618221 is 12281601.

It is not a de Polignac number, because 10618221 - 2¹¹ = 10616173 is a prime.

It is a super-2 number, since 2×10618221² = 225493234409682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10618211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21030 + ... + 21528.

It is an arithmetic number, because the mean of its divisors is an integer number (913500).

Almost surely, 2^10618221 is an apocalyptic number.

It is an amenable number.

10618221 is a deficient number, since it is larger than the sum of its proper divisors (3997779).

10618221 is a wasteful number, since it uses less digits than its factorization.

10618221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 10618221 is about 3258.5611855541. The cubic root of 10618221 is about 219.7947189811.

Adding to 10618221 its reverse (12281601), we get a palindrome (22899822).

The spelling of 10618221 in words is "ten million, six hundred eighteen thousand, two hundred twenty-one".