213553642220366 has 48 divisors (see below), whose sum is σ = 386528953492800. Its totient is φ = 88126241853888.

The previous prime is 213553642220351. The next prime is 213553642220419. The reversal of 213553642220366 is 663022246355312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101330321 + ... + 103416348.

It is an arithmetic number, because the mean of its divisors is an integer number (8052686531100).

Almost surely, 2^{213553642220366} is an apocalyptic number.

213553642220366 is a deficient number, since it is larger than the sum of its proper divisors (172975311272434).

213553642220366 is a wasteful number, since it uses less digits than its factorization.

213553642220366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204747081 (or 204747074 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 50.

Adding to 213553642220366 its reverse (663022246355312), we get a palindrome (876575888575678).

The spelling of 213553642220366 in words is "two hundred thirteen trillion, five hundred fifty-three billion, six hundred forty-two million, two hundred twenty thousand, three hundred sixty-six".