221411644275351 has 4 divisors (see below), whose sum is σ = 295215525700472. Its totient is φ = 147607762850232.

The previous prime is 221411644275281. The next prime is 221411644275389. The reversal of 221411644275351 is 153572446114122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221411644275351 - 2¹⁹ = 221411643751063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221411644275351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221411643275351) 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, 36901940712556 + ... + 36901940712561.

It is an arithmetic number, because the mean of its divisors is an integer number (73803881425118).

Almost surely, 2^{221411644275351} is an apocalyptic number.

221411644275351 is a deficient number, since it is larger than the sum of its proper divisors (73803881425121).

221411644275351 is an equidigital number, since it uses as much as digits as its factorization.

221411644275351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73803881425120.

The product of its digits is 1612800, while the sum is 48.

The spelling of 221411644275351 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty-four million, two hundred seventy-five thousand, three hundred fifty-one".