2613512021 has 2 divisors, whose sum is σ = 2613512022. Its totient is φ = 2613512020.

The previous prime is 2613511993. The next prime is 2613512087. The reversal of 2613512021 is 1202153162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2523052900 + 90459121 = 50230^2 + 9511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2613512021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2613512821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306756010 + 1306756011.

It is an arithmetic number, because the mean of its divisors is an integer number (1306756011).

Almost surely, 2^2613512021 is an apocalyptic number.

It is an amenable number.

2613512021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2613512021 is an equidigital number, since it uses as much as digits as its factorization.

2613512021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2613512021 is about 51122.5197051163. The cubic root of 2613512021 is about 1377.4467985817.

Adding to 2613512021 its reverse (1202153162), we get a palindrome (3815665183).

The spelling of 2613512021 in words is "two billion, six hundred thirteen million, five hundred twelve thousand, twenty-one".