213453641566 has 8 divisors (see below), whose sum is σ = 349287777144. Its totient is φ = 97024382520.

The previous prime is 213453641459. The next prime is 213453641587. The reversal of 213453641566 is 665146354312.

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

It is a congruent number.

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, 4851219105 + ... + 4851219148.

It is an arithmetic number, because the mean of its divisors is an integer number (43660972143).

Almost surely, 2^213453641566 is an apocalyptic number.

213453641566 is a deficient number, since it is larger than the sum of its proper divisors (135834135578).

213453641566 is a wasteful number, since it uses less digits than its factorization.

213453641566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9702438266.

The product of its digits is 1555200, while the sum is 46.

Adding to 213453641566 its reverse (665146354312), we get a palindrome (878599995878).

The spelling of 213453641566 in words is "two hundred thirteen billion, four hundred fifty-three million, six hundred forty-one thousand, five hundred sixty-six".