213554903 has 2 divisors, whose sum is σ = 213554904. Its totient is φ = 213554902.

The previous prime is 213554879. The next prime is 213554917. The reversal of 213554903 is 309455312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213554903 - 2¹² = 213550807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213554903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213554923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106777451 + 106777452.

It is an arithmetic number, because the mean of its divisors is an integer number (106777452).

Almost surely, 2^213554903 is an apocalyptic number.

213554903 is a deficient number, since it is larger than the sum of its proper divisors (1).

213554903 is an equidigital number, since it uses as much as digits as its factorization.

213554903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 213554903 is about 14613.5178174182. The cubic root of 213554903 is about 597.7274244981.

The spelling of 213554903 in words is "two hundred thirteen million, five hundred fifty-four thousand, nine hundred three".