2180651 has 4 divisors (see below), whose sum is σ = 2378904. Its totient is φ = 1982400.

The previous prime is 2180627. The next prime is 2180677. The reversal of 2180651 is 1560812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2180651 - 2⁶ = 2180587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99110 + ... + 99131.

It is an arithmetic number, because the mean of its divisors is an integer number (594726).

2^2180651 is an apocalyptic number.

2180651 is a deficient number, since it is larger than the sum of its proper divisors (198253).

2180651 is a wasteful number, since it uses less digits than its factorization.

2180651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198252.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2180651 is about 1476.7027459851. The cubic root of 2180651 is about 129.6767313166.

The spelling of 2180651 in words is "two million, one hundred eighty thousand, six hundred fifty-one".