221234213352551 has 8 divisors (see below), whose sum is σ = 252841122570624. Its totient is φ = 189627809533560.

The previous prime is 221234213352487. The next prime is 221234213352577. The reversal of 221234213352551 is 155253312432122.

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

It is a cyclic number.

It is not a de Polignac number, because 221234213352551 - 2⁶ = 221234213352487 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221234213352499 and 221234213352508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234213252551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125411285 + ... + 127163118.

It is an arithmetic number, because the mean of its divisors is an integer number (31605140321328).

Almost surely, 2^{221234213352551} is an apocalyptic number.

221234213352551 is a deficient number, since it is larger than the sum of its proper divisors (31606909218073).

221234213352551 is a wasteful number, since it uses less digits than its factorization.

221234213352551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252699541.

The product of its digits is 432000, while the sum is 41.

Adding to 221234213352551 its reverse (155253312432122), we get a palindrome (376487525784673).

The spelling of 221234213352551 in words is "two hundred twenty-one trillion, two hundred thirty-four billion, two hundred thirteen million, three hundred fifty-two thousand, five hundred fifty-one".