212431086493 has 2 divisors, whose sum is σ = 212431086494. Its totient is φ = 212431086492.

The previous prime is 212431086467. The next prime is 212431086521. The reversal of 212431086493 is 394680134212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123356893284 + 89074193209 = 351222^2 + 298453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212431086493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212431086463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106215543246 + 106215543247.

It is an arithmetic number, because the mean of its divisors is an integer number (106215543247).

Almost surely, 2^212431086493 is an apocalyptic number.

It is an amenable number.

212431086493 is a deficient number, since it is larger than the sum of its proper divisors (1).

212431086493 is an equidigital number, since it uses as much as digits as its factorization.

212431086493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 212431086493 in words is "two hundred twelve billion, four hundred thirty-one million, eighty-six thousand, four hundred ninety-three".