213739619065 has 32 divisors (see below), whose sum is σ = 308809912320. Its totient is φ = 138736338624.

The previous prime is 213739619063. The next prime is 213739619077. The reversal of 213739619065 is 560916937312.

It is a cyclic number.

It is not a de Polignac number, because 213739619065 - 2¹ = 213739619063 is a prime.

It is a super-2 number, since 2×213739619065² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213739619063) 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 31 ways as a sum of consecutive naturals, for example, 681892 + ... + 944698.

It is an arithmetic number, because the mean of its divisors is an integer number (9650309760).

Almost surely, 2^213739619065 is an apocalyptic number.

It is an amenable number.

213739619065 is a deficient number, since it is larger than the sum of its proper divisors (95070293255).

213739619065 is a wasteful number, since it uses less digits than its factorization.

213739619065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264061.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 213739619065 in words is "two hundred thirteen billion, seven hundred thirty-nine million, six hundred nineteen thousand, sixty-five".