213206656525 has 24 divisors (see below), whose sum is σ = 280891709280. Its totient is φ = 160077994560.

The previous prime is 213206656519. The next prime is 213206656529. The reversal of 213206656525 is 525656602312.

It is not a de Polignac number, because 213206656525 - 2¹⁵ = 213206623757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213206656529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2046634 + ... + 2148283.

It is an arithmetic number, because the mean of its divisors is an integer number (11703821220).

Almost surely, 2^213206656525 is an apocalyptic number.

213206656525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213206656525 is a deficient number, since it is larger than the sum of its proper divisors (67685052755).

213206656525 is a wasteful number, since it uses less digits than its factorization.

213206656525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195053 (or 4195048 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 213206656525 in words is "two hundred thirteen billion, two hundred six million, six hundred fifty-six thousand, five hundred twenty-five".