2180951 has 4 divisors (see below), whose sum is σ = 2185152. Its totient is φ = 2176752.

The previous prime is 2180923. The next prime is 2180957. The reversal of 2180951 is 1590812.

It is a happy number.

2180951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2180951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (546288).

2^2180951 is an apocalyptic number.

2180951 is a deficient number, since it is larger than the sum of its proper divisors (4201).

2180951 is an equidigital number, since it uses as much as digits as its factorization.

2180951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 2180951 is about 1476.8043201454. The cubic root of 2180951 is about 129.6826777420.

The spelling of 2180951 in words is "two million, one hundred eighty thousand, nine hundred fifty-one".