2321531 has 2 divisors, whose sum is σ = 2321532. Its totient is φ = 2321530.

The previous prime is 2321519. The next prime is 2321563. The reversal of 2321531 is 1351232.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2321531 is a prime.

It is a super-2 number, since 2×2321531² = 10779012367922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2311531) 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, 1160765 + 1160766.

It is an arithmetic number, because the mean of its divisors is an integer number (1160766).

2^2321531 is an apocalyptic number.

2321531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321531 is an equidigital number, since it uses as much as digits as its factorization.

2321531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 17.

The square root of 2321531 is about 1523.6571136578. The cubic root of 2321531 is about 132.4112328193.

Adding to 2321531 its reverse (1351232), we get a palindrome (3672763).

Subtracting from 2321531 its reverse (1351232), we obtain a cube (970299 = 99³).

The spelling of 2321531 in words is "two million, three hundred twenty-one thousand, five hundred thirty-one".