2805216331 has 2 divisors, whose sum is σ = 2805216332. Its totient is φ = 2805216330.

The previous prime is 2805216263. The next prime is 2805216343. The reversal of 2805216331 is 1336125082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2805216331 - 2⁷ = 2805216203 is a prime.

It is a super-2 number, since 2×2805216331² = 15738477327418203122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2805216293 and 2805216302.

It is not a weakly prime, because it can be changed into another prime (2805216361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402608165 + 1402608166.

It is an arithmetic number, because the mean of its divisors is an integer number (1402608166).

Almost surely, 2^2805216331 is an apocalyptic number.

2805216331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805216331 is an equidigital number, since it uses as much as digits as its factorization.

2805216331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2805216331 is about 52964.2929812152. The cubic root of 2805216331 is about 1410.3344663686.

The spelling of 2805216331 in words is "two billion, eight hundred five million, two hundred sixteen thousand, three hundred thirty-one".