213412138540 has 48 divisors (see below), whose sum is σ = 464564328480. Its totient is φ = 82253265920.

The previous prime is 213412138531. The next prime is 213412138543. The reversal of 213412138540 is 45831214312.

It is a junction number, because it is equal to n+sod(n) for n = 213412138496 and 213412138505.

It is not an unprimeable number, because it can be changed into a prime (213412138543) 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, 89917 + ... + 659476.

It is an arithmetic number, because the mean of its divisors is an integer number (9678423510).

Almost surely, 2^213412138540 is an apocalyptic number.

213412138540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213412138540 is an abundant number, since it is smaller than the sum of its proper divisors (251152189940).

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

213412138540 is a wasteful number, since it uses less digits than its factorization.

213412138540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749922 (or 749920 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 213412138540 in words is "two hundred thirteen billion, four hundred twelve million, one hundred thirty-eight thousand, five hundred forty".