2148731 has 4 divisors (see below), whose sum is σ = 2314032. Its totient is φ = 1983432.

The previous prime is 2148719. The next prime is 2148733. The reversal of 2148731 is 1378412.

2148731 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 a de Polignac number, because none of the positive numbers 2^k-2148731 is a prime.

It is a super-2 number, since 2×2148731² = 9234089820722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2148731.

It is not an unprimeable number, because it can be changed into a prime (2148733) by changing a digit.

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, 82631 + ... + 82656.

It is an arithmetic number, because the mean of its divisors is an integer number (578508).

2^2148731 is an apocalyptic number.

2148731 is a deficient number, since it is larger than the sum of its proper divisors (165301).

2148731 is a wasteful number, since it uses less digits than its factorization.

2148731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165300.

The product of its digits is 1344, while the sum is 26.

The square root of 2148731 is about 1465.8550405821. The cubic root of 2148731 is about 129.0408900280.

The spelling of 2148731 in words is "two million, one hundred forty-eight thousand, seven hundred thirty-one".