213183434745 has 48 divisors (see below), whose sum is σ = 376631311680. Its totient is φ = 111517830528.

The previous prime is 213183434693. The next prime is 213183434749. The reversal of 213183434745 is 547434381312.

It is a happy number.

213183434745 is a `hidden beast` number, since 2 + 131 + 8 + 3 + 43 + 474 + 5 = 666.

It is not a de Polignac number, because 213183434745 - 2¹⁰ = 213183433721 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 213183434745.

It is not an unprimeable number, because it can be changed into a prime (213183434749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1085539 + ... + 1266791.

It is an arithmetic number, because the mean of its divisors is an integer number (7846485660).

Almost surely, 2^213183434745 is an apocalyptic number.

It is an amenable number.

213183434745 is a deficient number, since it is larger than the sum of its proper divisors (163447876935).

213183434745 is a wasteful number, since it uses less digits than its factorization.

213183434745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181766 (or 181763 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The spelling of 213183434745 in words is "two hundred thirteen billion, one hundred eighty-three million, four hundred thirty-four thousand, seven hundred forty-five".