206030213591 has 2 divisors, whose sum is σ = 206030213592. Its totient is φ = 206030213590.

The previous prime is 206030213561. The next prime is 206030213611. The reversal of 206030213591 is 195312030602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206030213591 - 2²⁶ = 205963104727 is a prime.

It is a super-2 number, since 2×206030213591² (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 (206030213561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103015106795 + 103015106796.

It is an arithmetic number, because the mean of its divisors is an integer number (103015106796).

Almost surely, 2^206030213591 is an apocalyptic number.

206030213591 is a deficient number, since it is larger than the sum of its proper divisors (1).

206030213591 is an equidigital number, since it uses as much as digits as its factorization.

206030213591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The spelling of 206030213591 in words is "two hundred six billion, thirty million, two hundred thirteen thousand, five hundred ninety-one".