213840722865 has 96 divisors (see below), whose sum is σ = 434651028480. Its totient is φ = 88774089600.

The previous prime is 213840722863. The next prime is 213840722873. The reversal of 213840722865 is 568227048312.

It is not a de Polignac number, because 213840722865 - 2¹ = 213840722863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213840722863) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7836916 + ... + 7864154.

It is an arithmetic number, because the mean of its divisors is an integer number (4527614880).

Almost surely, 2^213840722865 is an apocalyptic number.

It is an amenable number.

213840722865 is an abundant number, since it is smaller than the sum of its proper divisors (220810305615).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213840722865 is a wasteful number, since it uses less digits than its factorization.

213840722865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28243 (or 28236 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 213840722865 in words is "two hundred thirteen billion, eight hundred forty million, seven hundred twenty-two thousand, eight hundred sixty-five".