216261344903 has 2 divisors, whose sum is σ = 216261344904. Its totient is φ = 216261344902.

The previous prime is 216261344899. The next prime is 216261344993. The reversal of 216261344903 is 309443162612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216261344903 - 2² = 216261344899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216261344993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108130672451 + 108130672452.

It is an arithmetic number, because the mean of its divisors is an integer number (108130672452).

Almost surely, 2^216261344903 is an apocalyptic number.

216261344903 is a deficient number, since it is larger than the sum of its proper divisors (1).

216261344903 is an equidigital number, since it uses as much as digits as its factorization.

216261344903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 216261344903 in words is "two hundred sixteen billion, two hundred sixty-one million, three hundred forty-four thousand, nine hundred three".