213243463 has 2 divisors, whose sum is σ = 213243464. Its totient is φ = 213243462.

The previous prime is 213243449. The next prime is 213243509. The reversal of 213243463 is 364342312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213243463 is a prime.

It is equal to p_11770705 and since 213243463 and 11770705 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213243413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621731 + 106621732.

It is an arithmetic number, because the mean of its divisors is an integer number (106621732).

Almost surely, 2^213243463 is an apocalyptic number.

213243463 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243463 is an equidigital number, since it uses as much as digits as its factorization.

213243463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 28.

The square root of 213243463 is about 14602.8580421779. The cubic root of 213243463 is about 597.4367158105.

Adding to 213243463 its reverse (364342312), we get a palindrome (577585775).

The spelling of 213243463 in words is "two hundred thirteen million, two hundred forty-three thousand, four hundred sixty-three".