2156751 has 12 divisors (see below), whose sum is σ = 3188328. Its totient is φ = 1404144.

The previous prime is 2156731. The next prime is 2156753. The reversal of 2156751 is 1576512.

2156751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2156751 - 2⁵ = 2156719 is a prime.

2156751 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156753) 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 11 ways as a sum of consecutive naturals, for example, 2400 + ... + 3173.

It is an arithmetic number, because the mean of its divisors is an integer number (265694).

2^2156751 is an apocalyptic number.

2156751 is a deficient number, since it is larger than the sum of its proper divisors (1031577).

2156751 is a wasteful number, since it uses less digits than its factorization.

2156751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5622 (or 5619 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2156751 is about 1468.5880974596. The cubic root of 2156751 is about 129.2012363015.

The spelling of 2156751 in words is "two million, one hundred fifty-six thousand, seven hundred fifty-one".