1823531 has 2 divisors, whose sum is σ = 1823532. Its totient is φ = 1823530.

The previous prime is 1823489. The next prime is 1823533. The reversal of 1823531 is 1353281.

It is a strong prime.

It is an emirp because it is prime and its reverse (1353281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1823531 is a prime.

It is a super-2 number, since 2×1823531² = 6650530615922, which contains 22 as substring.

Together with 1823533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1823497 and 1823506.

It is not a weakly prime, because it can be changed into another prime (1823533) 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 as a sum of consecutive naturals, namely, 911765 + 911766.

It is an arithmetic number, because the mean of its divisors is an integer number (911766).

2^1823531 is an apocalyptic number.

1823531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1823531 is an equidigital number, since it uses as much as digits as its factorization.

1823531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 1823531 is about 1350.3817978631. The cubic root of 1823531 is about 122.1718218579.

The spelling of 1823531 in words is "one million, eight hundred twenty-three thousand, five hundred thirty-one".