221411675435551 has 4 divisors (see below), whose sum is σ = 221411724508312. Its totient is φ = 221411626362792.

The previous prime is 221411675435527. The next prime is 221411675435579. The reversal of 221411675435551 is 155534576114122.

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

It is a cyclic number.

It is not a de Polignac number, because 221411675435551 - 2¹⁵ = 221411675402783 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 (221411675435501) 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, 16996125 + ... + 27049798.

It is an arithmetic number, because the mean of its divisors is an integer number (55352931127078).

Almost surely, 2^{221411675435551} is an apocalyptic number.

221411675435551 is a deficient number, since it is larger than the sum of its proper divisors (49072761).

221411675435551 is an equidigital number, since it uses as much as digits as its factorization.

221411675435551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49072760.

The product of its digits is 5040000, while the sum is 52.

The spelling of 221411675435551 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred seventy-five million, four hundred thirty-five thousand, five hundred fifty-one".