2165437 has 4 divisors (see below), whose sum is σ = 2215840. Its totient is φ = 2115036.

The previous prime is 2165413. The next prime is 2165453. The reversal of 2165437 is 7345612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25137 + ... + 25222.

It is an arithmetic number, because the mean of its divisors is an integer number (553960).

2^2165437 is an apocalyptic number.

It is an amenable number.

2165437 is a deficient number, since it is larger than the sum of its proper divisors (50403).

2165437 is an equidigital number, since it uses as much as digits as its factorization.

2165437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50402.

The product of its digits is 5040, while the sum is 28.

The square root of 2165437 is about 1471.5423881085. The cubic root of 2165437 is about 129.3744503543.

The spelling of 2165437 in words is "two million, one hundred sixty-five thousand, four hundred thirty-seven".