2650221 has 48 divisors (see below), whose sum is σ = 4792320. Its totient is φ = 1378080.

The previous prime is 2650211. The next prime is 2650229. The reversal of 2650221 is 1220562.

It is not a de Polignac number, because 2650221 - 2⁶ = 2650157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2650194 and 2650203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2650229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44890 + ... + 44948.

It is an arithmetic number, because the mean of its divisors is an integer number (99840).

2^2650221 is an apocalyptic number.

2650221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2650221 is a deficient number, since it is larger than the sum of its proper divisors (2142099).

2650221 is a wasteful number, since it uses less digits than its factorization.

2650221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2650221 is about 1627.9499378052. The cubic root of 2650221 is about 138.3865971239.

Adding to 2650221 its reverse (1220562), we get a palindrome (3870783).

The spelling of 2650221 in words is "two million, six hundred fifty thousand, two hundred twenty-one".