213822781470 has 96 divisors (see below), whose sum is σ = 562849795872. Its totient is φ = 56311155456.

The previous prime is 213822781451. The next prime is 213822781531. The reversal of 213822781470 is 74187228312.

213822781470 is a `hidden beast` number, since 2 + 1 + 3 + 82 + 27 + 81 + 470 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34635304 + ... + 34641476.

It is an arithmetic number, because the mean of its divisors is an integer number (5863018707).

Almost surely, 2^213822781470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213822781470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281424897936).

213822781470 is an abundant number, since it is smaller than the sum of its proper divisors (349027014402).

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

213822781470 is a wasteful number, since it uses less digits than its factorization.

213822781470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10906 (or 10903 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 213822781470 in words is "two hundred thirteen billion, eight hundred twenty-two million, seven hundred eighty-one thousand, four hundred seventy".