2540231 has 2 divisors, whose sum is σ = 2540232. Its totient is φ = 2540230.

The previous prime is 2540203. The next prime is 2540249. The reversal of 2540231 is 1320452.

2540231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540231 is a prime.

It is a super-2 number, since 2×2540231² = 12905547066722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2540201) 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 as a sum of consecutive naturals, namely, 1270115 + 1270116.

It is an arithmetic number, because the mean of its divisors is an integer number (1270116).

2^2540231 is an apocalyptic number.

2540231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2540231 is an equidigital number, since it uses as much as digits as its factorization.

2540231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2540231 is about 1593.8102145488. The cubic root of 2540231 is about 136.4450350514.

Adding to 2540231 its reverse (1320452), we get a palindrome (3860683).

The spelling of 2540231 in words is "two million, five hundred forty thousand, two hundred thirty-one".