2540223 has 24 divisors (see below), whose sum is σ = 4268576. Its totient is φ = 1425600.

The previous prime is 2540203. The next prime is 2540231. The reversal of 2540223 is 3220452.

It is not a de Polignac number, because 2540223 - 2¹⁴ = 2523839 is a prime.

It is a Duffinian number.

2540223 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2540196 and 2540205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540203) 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 23 ways as a sum of consecutive naturals, for example, 3513 + ... + 4173.

2^2540223 is an apocalyptic number.

2540223 is a deficient number, since it is larger than the sum of its proper divisors (1728353).

2540223 is a wasteful number, since it uses less digits than its factorization.

2540223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 2540223 is about 1593.8077048377. The cubic root of 2540223 is about 136.4448918149. Note that the first 3 decimals are identical.

Adding to 2540223 its reverse (3220452), we get a palindrome (5760675).

It can be divided in two parts, 25402 and 23, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 2540223 in words is "two million, five hundred forty thousand, two hundred twenty-three".