2951221 has 24 divisors (see below), whose sum is σ = 3820824. Its totient is φ = 2257920.

The previous prime is 2951209. The next prime is 2951233. The reversal of 2951221 is 1221592.

It is an interprime number because it is at equal distance from previous prime (2951209) and next prime (2951233).

It can be written as a sum of positive squares in 4 ways, for example, as 470596 + 2480625 = 686^2 + 1575^2 .

It is not a de Polignac number, because 2951221 - 2⁵ = 2951189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2951192 and 2951201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2951021) 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, 26061 + ... + 26173.

It is an arithmetic number, because the mean of its divisors is an integer number (159201).

2^2951221 is an apocalyptic number.

It is an amenable number.

2951221 is a deficient number, since it is larger than the sum of its proper divisors (869603).

2951221 is a wasteful number, since it uses less digits than its factorization.

2951221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 174 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 2951221 is about 1717.9118138019. The cubic root of 2951221 is about 143.4389984623.

The spelling of 2951221 in words is "two million, nine hundred fifty-one thousand, two hundred twenty-one".