216265273331 has 2 divisors, whose sum is σ = 216265273332. Its totient is φ = 216265273330.

The previous prime is 216265273321. The next prime is 216265273361. The reversal of 216265273331 is 133372562612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216265273331 is a prime.

It is a super-2 number, since 2×216265273331² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (216265273321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108132636665 + 108132636666.

It is an arithmetic number, because the mean of its divisors is an integer number (108132636666).

Almost surely, 2^216265273331 is an apocalyptic number.

216265273331 is a deficient number, since it is larger than the sum of its proper divisors (1).

216265273331 is an equidigital number, since it uses as much as digits as its factorization.

216265273331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 41.

The spelling of 216265273331 in words is "two hundred sixteen billion, two hundred sixty-five million, two hundred seventy-three thousand, three hundred thirty-one".