2220981 has 8 divisors (see below), whose sum is σ = 3384384. Its totient is φ = 1269120.

The previous prime is 2220979. The next prime is 2221007. The reversal of 2220981 is 1890222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2220981 - 2¹ = 2220979 is a prime.

It is a super-2 number, since 2×2220981² = 9865513204722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52860 + ... + 52901.

It is an arithmetic number, because the mean of its divisors is an integer number (423048).

2^2220981 is an apocalyptic number.

2220981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2220981 is a deficient number, since it is larger than the sum of its proper divisors (1163403).

2220981 is a wasteful number, since it uses less digits than its factorization.

2220981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105771.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2220981 is about 1490.2956082603. The cubic root of 2220981 is about 130.4712874105.

The spelling of 2220981 in words is "two million, two hundred twenty thousand, nine hundred eighty-one".