2205651 has 8 divisors (see below), whose sum is σ = 3361024. Its totient is φ = 1260360.

The previous prime is 2205649. The next prime is 2205659. The reversal of 2205651 is 1565022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2205651 - 2¹ = 2205649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 105031 = 2205651 / (2 + 2 + 0 + 5 + 6 + 5 + 1).

It is a Duffinian number.

2205651 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2205659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52495 + ... + 52536.

It is an arithmetic number, because the mean of its divisors is an integer number (420128).

2^2205651 is an apocalyptic number.

2205651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2205651 is a deficient number, since it is larger than the sum of its proper divisors (1155373).

2205651 is a wasteful number, since it uses less digits than its factorization.

2205651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105041.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2205651 is about 1485.1434274170. The cubic root of 2205651 is about 130.1704076909.

The spelling of 2205651 in words is "two million, two hundred five thousand, six hundred fifty-one".