2159431 has 4 divisors (see below), whose sum is σ = 2217832. Its totient is φ = 2101032.

The previous prime is 2159419. The next prime is 2159449. The reversal of 2159431 is 1349512.

2159431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2159431 - 2⁷ = 2159303 is a prime.

It is a super-2 number, since 2×2159431² = 9326284487522, which contains 22 as substring.

It is the 1470-th Hogben number.

It is a Duffinian number.

2159431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2159396 and 2159405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159231) by changing a digit.

It is a nontrivial repunit in base 1469.

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 3 ways as a sum of consecutive naturals, for example, 29145 + ... + 29218.

It is an arithmetic number, because the mean of its divisors is an integer number (554458).

2^2159431 is an apocalyptic number.

2159431 is a deficient number, since it is larger than the sum of its proper divisors (58401).

2159431 is an equidigital number, since it uses as much as digits as its factorization.

2159431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58400.

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

The square root of 2159431 is about 1469.5002551888. The cubic root of 2159431 is about 129.2547297260.

The spelling of 2159431 in words is "two million, one hundred fifty-nine thousand, four hundred thirty-one".