2151943 has 2 divisors, whose sum is σ = 2151944. Its totient is φ = 2151942.

The previous prime is 2151923. The next prime is 2151971. The reversal of 2151943 is 3491512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075971 + 1075972.

It is an arithmetic number, because the mean of its divisors is an integer number (1075972).

2^2151943 is an apocalyptic number.

2151943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151943 is an equidigital number, since it uses as much as digits as its factorization.

2151943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 2151943 is about 1466.9502377381. The cubic root of 2151943 is about 129.1051563297.

The spelling of 2151943 in words is "two million, one hundred fifty-one thousand, nine hundred forty-three".