213019762217 has 2 divisors, whose sum is σ = 213019762218. Its totient is φ = 213019762216.

The previous prime is 213019762213. The next prime is 213019762253. The reversal of 213019762217 is 712267910312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212761710121 + 258052096 = 461261^2 + 16064^2 .

It is a cyclic number.

It is not a de Polignac number, because 213019762217 - 2² = 213019762213 is a prime.

It is not a weakly prime, because it can be changed into another prime (213019762213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106509881108 + 106509881109.

It is an arithmetic number, because the mean of its divisors is an integer number (106509881109).

Almost surely, 2^213019762217 is an apocalyptic number.

It is an amenable number.

213019762217 is a deficient number, since it is larger than the sum of its proper divisors (1).

213019762217 is an equidigital number, since it uses as much as digits as its factorization.

213019762217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 213019762217 in words is "two hundred thirteen billion, nineteen million, seven hundred sixty-two thousand, two hundred seventeen".