1822531 has 4 divisors (see below), whose sum is σ = 1839672. Its totient is φ = 1805392.

The previous prime is 1822529. The next prime is 1822547. The reversal of 1822531 is 1352281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1352281 = 7 ⋅193183.

It is a cyclic number.

It is not a de Polignac number, because 1822531 - 2¹ = 1822529 is a prime.

It is a super-2 number, since 2×1822531² = 6643238491922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1822501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8410 + ... + 8623.

It is an arithmetic number, because the mean of its divisors is an integer number (459918).

2^1822531 is an apocalyptic number.

1822531 is a deficient number, since it is larger than the sum of its proper divisors (17141).

1822531 is a wasteful number, since it uses less digits than its factorization.

1822531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17140.

The product of its digits is 480, while the sum is 22.

The square root of 1822531 is about 1350.0114814327. The cubic root of 1822531 is about 122.1494853103.

The spelling of 1822531 in words is "one million, eight hundred twenty-two thousand, five hundred thirty-one".