2990221 has 4 divisors (see below), whose sum is σ = 3220252. Its totient is φ = 2760192.

The previous prime is 2990213. The next prime is 2990227. The reversal of 2990221 is 1220992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1929321 + 1060900 = 1389^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2990221 - 2³ = 2990213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2990227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114996 + ... + 115021.

It is an arithmetic number, because the mean of its divisors is an integer number (805063).

2^2990221 is an apocalyptic number.

It is an amenable number.

2990221 is a deficient number, since it is larger than the sum of its proper divisors (230031).

2990221 is a wasteful number, since it uses less digits than its factorization.

2990221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230030.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2990221 is about 1729.2255491983. The cubic root of 2990221 is about 144.0680780210.

The spelling of 2990221 in words is "two million, nine hundred ninety thousand, two hundred twenty-one".