213966836431 has 2 divisors, whose sum is σ = 213966836432. Its totient is φ = 213966836430.

The previous prime is 213966836423. The next prime is 213966836437. The reversal of 213966836431 is 134638669312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213966836431 - 2³ = 213966836423 is a prime.

It is a super-2 number, since 2×213966836431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213966836437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106983418215 + 106983418216.

It is an arithmetic number, because the mean of its divisors is an integer number (106983418216).

Almost surely, 2^213966836431 is an apocalyptic number.

213966836431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213966836431 is an equidigital number, since it uses as much as digits as its factorization.

213966836431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 52.

The spelling of 213966836431 in words is "two hundred thirteen billion, nine hundred sixty-six million, eight hundred thirty-six thousand, four hundred thirty-one".