213215340213440 has 112 divisors (see below), whose sum is σ = 508619777141952. Its totient is φ = 85134953742336.

The previous prime is 213215340213437. The next prime is 213215340213487. The reversal of 213215340213440 is 44312043512312.

It is a self number, because there is not a number n which added to its sum of digits gives 213215340213440.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440561672 + ... + 441045368.

It is an arithmetic number, because the mean of its divisors is an integer number (4541248010196).

Almost surely, 2^{213215340213440} is an apocalyptic number.

213215340213440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213215340213440 is an abundant number, since it is smaller than the sum of its proper divisors (295404436928512).

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

213215340213440 is a wasteful number, since it uses less digits than its factorization.

213215340213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486154 (or 486144 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 213215340213440 its reverse (44312043512312), we get a palindrome (257527383725752).

The spelling of 213215340213440 in words is "two hundred thirteen trillion, two hundred fifteen billion, three hundred forty million, two hundred thirteen thousand, four hundred forty".