213645520907 has 32 divisors (see below), whose sum is σ = 277205827584. Its totient is φ = 160104729600.

The previous prime is 213645520897. The next prime is 213645520931. The reversal of 213645520907 is 709025546312.

213645520907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 213645520907 - 2¹⁶ = 213645455371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213645528907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673094 + ... + 938267.

It is an arithmetic number, because the mean of its divisors is an integer number (8662682112).

Almost surely, 2^213645520907 is an apocalyptic number.

213645520907 is a deficient number, since it is larger than the sum of its proper divisors (63560306677).

213645520907 is a wasteful number, since it uses less digits than its factorization.

213645520907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611459.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 213645520907 in words is "two hundred thirteen billion, six hundred forty-five million, five hundred twenty thousand, nine hundred seven".