213730065999 has 12 divisors (see below), whose sum is σ = 316250992512. Its totient is φ = 139011424800.

The previous prime is 213730065973. The next prime is 213730066003. The reversal of 213730065999 is 999560037312.

It is a happy number.

213730065999 is a `hidden beast` number, since 2 + 13 + 7 + 30 + 0 + 6 + 599 + 9 = 666.

It is not a de Polignac number, because 213730065999 - 2¹² = 213730061903 is a prime.

It is a super-2 number, since 2×213730065999² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213730065959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289606767 + ... + 289607504.

It is an arithmetic number, because the mean of its divisors is an integer number (26354249376).

Almost surely, 2^213730065999 is an apocalyptic number.

213730065999 is a deficient number, since it is larger than the sum of its proper divisors (102520926513).

213730065999 is a wasteful number, since it uses less digits than its factorization.

213730065999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579214318 (or 579214315 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The spelling of 213730065999 in words is "two hundred thirteen billion, seven hundred thirty million, sixty-five thousand, nine hundred ninety-nine".