213351146647 has 4 divisors (see below), whose sum is σ = 213352191520. Its totient is φ = 213350101776.

The previous prime is 213351146597. The next prime is 213351146693. The reversal of 213351146647 is 746641153312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 213351146647 - 2³⁵ = 178991408279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213351146347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104943 + ... + 661600.

It is an arithmetic number, because the mean of its divisors is an integer number (53338047880).

Almost surely, 2^213351146647 is an apocalyptic number.

213351146647 is a deficient number, since it is larger than the sum of its proper divisors (1044873).

213351146647 is an equidigital number, since it uses as much as digits as its factorization.

213351146647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044872.

The product of its digits is 362880, while the sum is 43.

Adding to 213351146647 its reverse (746641153312), we get a palindrome (959992299959).

The spelling of 213351146647 in words is "two hundred thirteen billion, three hundred fifty-one million, one hundred forty-six thousand, six hundred forty-seven".