213023071 has 2 divisors, whose sum is σ = 213023072. Its totient is φ = 213023070.

The previous prime is 213023051. The next prime is 213023089. The reversal of 213023071 is 170320312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213023071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213023051) 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, 106511535 + 106511536.

It is an arithmetic number, because the mean of its divisors is an integer number (106511536).

Almost surely, 2^213023071 is an apocalyptic number.

213023071 is a deficient number, since it is larger than the sum of its proper divisors (1).

213023071 is an equidigital number, since it uses as much as digits as its factorization.

213023071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 213023071 is about 14595.3098973609. The cubic root of 213023071 is about 597.2308233558.

Adding to 213023071 its reverse (170320312), we get a palindrome (383343383).

The spelling of 213023071 in words is "two hundred thirteen million, twenty-three thousand, seventy-one".