2516545321 has 2 divisors, whose sum is σ = 2516545322. Its totient is φ = 2516545320.

The previous prime is 2516545247. The next prime is 2516545333. The reversal of 2516545321 is 1235456152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2177248921 + 339296400 = 46661^2 + 18420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516545321 - 2⁹ = 2516544809 is a prime.

It is a super-3 number, since 3×2516545321³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2516845321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258272660 + 1258272661.

It is an arithmetic number, because the mean of its divisors is an integer number (1258272661).

Almost surely, 2^2516545321 is an apocalyptic number.

It is an amenable number.

2516545321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2516545321 is an equidigital number, since it uses as much as digits as its factorization.

2516545321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

The square root of 2516545321 is about 50165.1803644719. The cubic root of 2516545321 is about 1360.1962881693.

The spelling of 2516545321 in words is "two billion, five hundred sixteen million, five hundred forty-five thousand, three hundred twenty-one".