2144531 has 4 divisors (see below), whose sum is σ = 2148672. Its totient is φ = 2140392.

The previous prime is 2144509. The next prime is 2144537. The reversal of 2144531 is 1354412.

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-2144531 is a prime.

It is a super-2 number, since 2×2144531² = 9198026419922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144537) 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, 1160 + ... + 2373.

It is an arithmetic number, because the mean of its divisors is an integer number (537168).

2^2144531 is an apocalyptic number.

2144531 is a deficient number, since it is larger than the sum of its proper divisors (4141).

2144531 is an equidigital number, since it uses as much as digits as its factorization.

2144531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140.

The product of its digits is 480, while the sum is 20.

The square root of 2144531 is about 1464.4217288746. The cubic root of 2144531 is about 128.9567589382.

Adding to 2144531 its reverse (1354412), we get a palindrome (3498943).

The spelling of 2144531 in words is "two million, one hundred forty-four thousand, five hundred thirty-one".