2218725 has 48 divisors (see below), whose sum is σ = 4315200. Its totient is φ = 1114560.

The previous prime is 2218709. The next prime is 2218751. The reversal of 2218725 is 5278122.

It is not a de Polignac number, because 2218725 - 2⁴ = 2218709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12739 + ... + 12911.

It is an arithmetic number, because the mean of its divisors is an integer number (89900).

2^2218725 is an apocalyptic number.

2218725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2218725 is a deficient number, since it is larger than the sum of its proper divisors (2096475).

2218725 is a wasteful number, since it uses less digits than its factorization.

2218725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 200 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2218725 is about 1489.5385191394. The cubic root of 2218725 is about 130.4270962862.

The spelling of 2218725 in words is "two million, two hundred eighteen thousand, seven hundred twenty-five".