2501813 has 2 divisors, whose sum is σ = 2501814. Its totient is φ = 2501812.

The previous prime is 2501803. The next prime is 2501819. The reversal of 2501813 is 3181052.

2501813 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 can be written as a sum of positive squares in only one way, i.e., 2486929 + 14884 = 1577^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2501813 - 2¹⁴ = 2485429 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501819) 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, 1250906 + 1250907.

It is an arithmetic number, because the mean of its divisors is an integer number (1250907).

2^2501813 is an apocalyptic number.

It is an amenable number.

2501813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501813 is an equidigital number, since it uses as much as digits as its factorization.

2501813 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 20.

The square root of 2501813 is about 1581.7120471186. The cubic root of 2501813 is about 135.7536811630.

Adding to 2501813 its reverse (3181052), we get a palindrome (5682865).

The spelling of 2501813 in words is "two million, five hundred one thousand, eight hundred thirteen".