2515321 has 2 divisors, whose sum is σ = 2515322. Its totient is φ = 2515320.

The previous prime is 2515319. The next prime is 2515339. The reversal of 2515321 is 1235152.

2515321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2359296 + 156025 = 1536^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2515321 - 2¹ = 2515319 is a prime.

Together with 2515319, it forms a pair of twin primes.

It is a Chen prime.

2515321 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2515301) 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, 1257660 + 1257661.

It is an arithmetic number, because the mean of its divisors is an integer number (1257661).

2^2515321 is an apocalyptic number.

It is an amenable number.

2515321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2515321 is an equidigital number, since it uses as much as digits as its factorization.

2515321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 19.

The square root of 2515321 is about 1585.9763554354. The cubic root of 2515321 is about 135.9975669980.

The spelling of 2515321 in words is "two million, five hundred fifteen thousand, three hundred twenty-one".