2205724 has 12 divisors (see below), whose sum is σ = 3896200. Its totient is φ = 1092528.

The previous prime is 2205719. The next prime is 2205761. The reversal of 2205724 is 4275022.

It is a super-3 number, since 3×2205724³ = 32193986733311230272, which contains 333 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2205695 and 2205704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094 + ... + 2965.

2^2205724 is an apocalyptic number.

It is an amenable number.

2205724 is a deficient number, since it is larger than the sum of its proper divisors (1690476).

2205724 is a wasteful number, since it uses less digits than its factorization.

2205724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172 (or 5170 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 2205724 is about 1485.1680039645. The cubic root of 2205724 is about 130.1718437499.

It can be divided in two parts, 220572 and 4, that multiplied together give a palindrome (882288).

The spelling of 2205724 in words is "two million, two hundred five thousand, seven hundred twenty-four".