213550111 has 2 divisors, whose sum is σ = 213550112. Its totient is φ = 213550110.

The previous prime is 213550109. The next prime is 213550157. The reversal of 213550111 is 111055312.

213550111 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 is a cyclic number.

It is not a de Polignac number, because 213550111 - 2¹ = 213550109 is a prime.

It is a super-2 number, since 2×213550111² = 91207299816224642, which contains 22 as substring.

Together with 213550109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213550411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106775055 + 106775056.

It is an arithmetic number, because the mean of its divisors is an integer number (106775056).

Almost surely, 2^213550111 is an apocalyptic number.

213550111 is a deficient number, since it is larger than the sum of its proper divisors (1).

213550111 is an equidigital number, since it uses as much as digits as its factorization.

213550111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 213550111 is about 14613.3538587143. The cubic root of 213550111 is about 597.7229536241.

The spelling of 213550111 in words is "two hundred thirteen million, five hundred fifty thousand, one hundred eleven".