213868531513 has 16 divisors (see below), whose sum is σ = 265828985856. Its totient is φ = 167539262400.

The previous prime is 213868531493. The next prime is 213868531517. The reversal of 213868531513 is 315135868312.

It is a cyclic number.

It is not a de Polignac number, because 213868531513 - 2³⁷ = 76429578041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213868531517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11625481 + ... + 11643862.

It is an arithmetic number, because the mean of its divisors is an integer number (16614311616).

Almost surely, 2^213868531513 is an apocalyptic number.

It is an amenable number.

213868531513 is a deficient number, since it is larger than the sum of its proper divisors (51960454343).

213868531513 is a wasteful number, since it uses less digits than its factorization.

213868531513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23269464.

The product of its digits is 518400, while the sum is 46.

The spelling of 213868531513 in words is "two hundred thirteen billion, eight hundred sixty-eight million, five hundred thirty-one thousand, five hundred thirteen".