2164731 has 4 divisors (see below), whose sum is σ = 2886312. Its totient is φ = 1443152.

The previous prime is 2164681. The next prime is 2164739. The reversal of 2164731 is 1374612.

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 2164731 - 2¹⁴ = 2148347 is a prime.

It is a super-2 number, since 2×2164731² = 9372120604722, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2164739) 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, 360786 + ... + 360791.

It is an arithmetic number, because the mean of its divisors is an integer number (721578).

2^2164731 is an apocalyptic number.

2164731 is a deficient number, since it is larger than the sum of its proper divisors (721581).

2164731 is an equidigital number, since it uses as much as digits as its factorization.

2164731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721580.

The product of its digits is 1008, while the sum is 24.

The square root of 2164731 is about 1471.3024841956. The cubic root of 2164731 is about 129.3603887908.

The spelling of 2164731 in words is "two million, one hundred sixty-four thousand, seven hundred thirty-one".