2156023 has 2 divisors, whose sum is σ = 2156024. Its totient is φ = 2156022.

The previous prime is 2156017. The next prime is 2156039. The reversal of 2156023 is 3206512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156023 - 2⁹ = 2155511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078011 + 1078012.

It is an arithmetic number, because the mean of its divisors is an integer number (1078012).

2^2156023 is an apocalyptic number.

2156023 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156023 is an equidigital number, since it uses as much as digits as its factorization.

2156023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2156023 is about 1468.3402194315. The cubic root of 2156023 is about 129.1866975988.

It can be divided in two parts, 2 and 156023, that added together give a square (156025 = 395²).

The spelling of 2156023 in words is "two million, one hundred fifty-six thousand, twenty-three".