213315505643431 has 2 divisors, whose sum is σ = 213315505643432. Its totient is φ = 213315505643430.

The previous prime is 213315505643407. The next prime is 213315505643459. The reversal of 213315505643431 is 134346505513312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213315505643431 - 2²⁷ = 213315371425703 is a prime.

It is a super-2 number, since 2×213315505643431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213315505643491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106657752821715 + 106657752821716.

It is an arithmetic number, because the mean of its divisors is an integer number (106657752821716).

Almost surely, 2^{213315505643431} is an apocalyptic number.

213315505643431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213315505643431 is an equidigital number, since it uses as much as digits as its factorization.

213315505643431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 213315505643431 in words is "two hundred thirteen trillion, three hundred fifteen billion, five hundred five million, six hundred forty-three thousand, four hundred thirty-one".