2156329 has 16 divisors (see below), whose sum is σ = 2682880. Its totient is φ = 1691280.

The previous prime is 2156317. The next prime is 2156339. The reversal of 2156329 is 9236512.

It is a cyclic number.

It is not a de Polignac number, because 2156329 - 2¹¹ = 2154281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2156297 and 2156306.

It is not an unprimeable number, because it can be changed into a prime (2156309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3862 + ... + 4384.

It is an arithmetic number, because the mean of its divisors is an integer number (167680).

2^2156329 is an apocalyptic number.

It is an amenable number.

2156329 is a deficient number, since it is larger than the sum of its proper divisors (526551).

2156329 is a wasteful number, since it uses less digits than its factorization.

2156329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its digits is 3240, while the sum is 28.

The square root of 2156329 is about 1468.4444150188. Note that the first 4 decimals coincide. The cubic root of 2156329 is about 129.1928090455.

It can be divided in two parts, 2156 and 329, that added together give a triangular number (2485 = T₇₀).

The spelling of 2156329 in words is "two million, one hundred fifty-six thousand, three hundred twenty-nine".