2540213 has 4 divisors (see below), whose sum is σ = 2735628. Its totient is φ = 2344800.

The previous prime is 2540203. The next prime is 2540231. The reversal of 2540213 is 3120452.

2540213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1044484 + 1495729 = 1022^2 + 1223^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540213 - 2¹⁰ = 2539189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2540191 and 2540200.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97688 + ... + 97713.

It is an arithmetic number, because the mean of its divisors is an integer number (683907).

2^2540213 is an apocalyptic number.

It is an amenable number.

2540213 is a deficient number, since it is larger than the sum of its proper divisors (195415).

2540213 is a wasteful number, since it uses less digits than its factorization.

2540213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195414.

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

The square root of 2540213 is about 1593.8045676933. The cubic root of 2540213 is about 136.4447127688. Note that the first 3 decimals are identical.

Adding to 2540213 its reverse (3120452), we get a palindrome (5660665).

The spelling of 2540213 in words is "two million, five hundred forty thousand, two hundred thirteen".