2151847 has 2 divisors, whose sum is σ = 2151848. Its totient is φ = 2151846.

The previous prime is 2151827. The next prime is 2151869. The reversal of 2151847 is 7481512.

2151847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151847 is a prime.

It is a super-2 number, since 2×2151847² = 9260891022818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2151817) 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 as a sum of consecutive naturals, namely, 1075923 + 1075924.

It is an arithmetic number, because the mean of its divisors is an integer number (1075924).

2^2151847 is an apocalyptic number.

2151847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151847 is an equidigital number, since it uses as much as digits as its factorization.

2151847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 28.

The square root of 2151847 is about 1466.9175164269. The cubic root of 2151847 is about 129.1032364710.

The spelling of 2151847 in words is "two million, one hundred fifty-one thousand, eight hundred forty-seven".