213431339993 has 2 divisors, whose sum is σ = 213431339994. Its totient is φ = 213431339992.

The previous prime is 213431339977. The next prime is 213431340013. The reversal of 213431339993 is 399933134312.

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., 113415379984 + 100015960009 = 336772^2 + 316253^2 .

It is a cyclic number.

It is not a de Polignac number, because 213431339993 - 2⁴ = 213431339977 is a prime.

It is a super-2 number, since 2×213431339993² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213431339903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106715669996 + 106715669997.

It is an arithmetic number, because the mean of its divisors is an integer number (106715669997).

Almost surely, 2^213431339993 is an apocalyptic number.

It is an amenable number.

213431339993 is a deficient number, since it is larger than the sum of its proper divisors (1).

213431339993 is an equidigital number, since it uses as much as digits as its factorization.

213431339993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 50.

The spelling of 213431339993 in words is "two hundred thirteen billion, four hundred thirty-one million, three hundred thirty-nine thousand, nine hundred ninety-three".