2205951 has 24 divisors (see below), whose sum is σ = 3319680. Its totient is φ = 1301520.

The previous prime is 2205949. The next prime is 2205989. The reversal of 2205951 is 1595022.

It is not a de Polignac number, because 2205951 - 2¹ = 2205949 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205911) 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 23 ways as a sum of consecutive naturals, for example, 21366 + ... + 21468.

It is an arithmetic number, because the mean of its divisors is an integer number (138320).

2^2205951 is an apocalyptic number.

2205951 is a deficient number, since it is larger than the sum of its proper divisors (1113729).

2205951 is a wasteful number, since it uses less digits than its factorization.

2205951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2205951 is about 1485.2444243289. The cubic root of 2205951 is about 130.1763091008.

The spelling of 2205951 in words is "two million, two hundred five thousand, nine hundred fifty-one".