213120247 has 2 divisors, whose sum is σ = 213120248. Its totient is φ = 213120246.

The previous prime is 213120241. The next prime is 213120253. The reversal of 213120247 is 742021312.

It is a balanced prime because it is at equal distance from previous prime (213120241) and next prime (213120253).

It is a cyclic number.

It is not a de Polignac number, because 213120247 - 2³ = 213120239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213120241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560123 + 106560124.

It is an arithmetic number, because the mean of its divisors is an integer number (106560124).

Almost surely, 2^213120247 is an apocalyptic number.

213120247 is a deficient number, since it is larger than the sum of its proper divisors (1).

213120247 is an equidigital number, since it uses as much as digits as its factorization.

213120247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 213120247 is about 14598.6385324112. The cubic root of 213120247 is about 597.3216236613.

Adding to 213120247 its reverse (742021312), we get a palindrome (955141559).

The spelling of 213120247 in words is "two hundred thirteen million, one hundred twenty thousand, two hundred forty-seven".