9220981 has 16 divisors (see below), whose sum is σ = 11870208. Its totient is φ = 6951600.

The previous prime is 9220969. The next prime is 9221011. The reversal of 9220981 is 1890229.

9220981 = T₃₉₈ + T₃₉₉ + ... + T₄₉₀.

It is a cyclic number.

It is not a de Polignac number, because 9220981 - 2¹⁹ = 8696693 is a prime.

It is a super-2 number, since 2×9220981² = 170052981204722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9220951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 456 + ... + 4318.

It is an arithmetic number, because the mean of its divisors is an integer number (741888).

Almost surely, 2^9220981 is an apocalyptic number.

It is an amenable number.

9220981 is a deficient number, since it is larger than the sum of its proper divisors (2649227).

9220981 is a wasteful number, since it uses less digits than its factorization.

9220981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 9220981 is about 3036.6068234133. The cubic root of 9220981 is about 209.6970764726.

It can be divided in two parts, 9220 and 981, that added together give a palindrome (10201).

The spelling of 9220981 in words is "nine million, two hundred twenty thousand, nine hundred eighty-one".