213644371 has 2 divisors, whose sum is σ = 213644372. Its totient is φ = 213644370.

The previous prime is 213644323. The next prime is 213644377. The reversal of 213644371 is 173446312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213644371 - 2¹¹ = 213642323 is a prime.

It is not a weakly prime, because it can be changed into another prime (213644377) 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, 106822185 + 106822186.

It is an arithmetic number, because the mean of its divisors is an integer number (106822186).

Almost surely, 2^213644371 is an apocalyptic number.

213644371 is a deficient number, since it is larger than the sum of its proper divisors (1).

213644371 is an equidigital number, since it uses as much as digits as its factorization.

213644371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 213644371 is about 14616.5786352347. The cubic root of 213644371 is about 597.8108847077.

The spelling of 213644371 in words is "two hundred thirteen million, six hundred forty-four thousand, three hundred seventy-one".