213243020432 has 20 divisors (see below), whose sum is σ = 444939764220. Its totient is φ = 98419855488.

The previous prime is 213243020401. The next prime is 213243020447. The reversal of 213243020432 is 234020342312.

It can be written as a sum of positive squares in 2 ways, for example, as 9863667856 + 203379352576 = 99316^2 + 450976^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512603207 + ... + 512603622.

It is an arithmetic number, because the mean of its divisors is an integer number (22246988211).

Almost surely, 2^213243020432 is an apocalyptic number.

It is an amenable number.

213243020432 is an abundant number, since it is smaller than the sum of its proper divisors (231696743788).

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

213243020432 is a wasteful number, since it uses less digits than its factorization.

213243020432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025206850 (or 1025206844 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 213243020432 its reverse (234020342312), we get a palindrome (447263362744).

The spelling of 213243020432 in words is "two hundred thirteen billion, two hundred forty-three million, twenty thousand, four hundred thirty-two".