213780405243 has 8 divisors (see below), whose sum is σ = 285115115008. Its totient is φ = 142482982824.

The previous prime is 213780405211. The next prime is 213780405259. The reversal of 213780405243 is 342504087312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213780405243 - 2⁵ = 213780405211 is a prime.

It is a super-2 number, since 2×213780405243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213780405283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9308455 + ... + 9331392.

It is an arithmetic number, because the mean of its divisors is an integer number (35639389376).

Almost surely, 2^213780405243 is an apocalyptic number.

213780405243 is a deficient number, since it is larger than the sum of its proper divisors (71334709765).

213780405243 is a wasteful number, since it uses less digits than its factorization.

213780405243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18643673.

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 213780405243 in words is "two hundred thirteen billion, seven hundred eighty million, four hundred five thousand, two hundred forty-three".