221431416361671 has 8 divisors (see below), whose sum is σ = 300812490151920. Its totient is φ = 144835643406272.

The previous prime is 221431416361583. The next prime is 221431416361679. The reversal of 221431416361671 is 176163614134122.

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 221431416361671 - 2⁹ = 221431416361159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221431416361671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431416361679) 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, 696325208526 + ... + 696325208843.

It is an arithmetic number, because the mean of its divisors is an integer number (37601561268990).

Almost surely, 2^{221431416361671} is an apocalyptic number.

221431416361671 is a deficient number, since it is larger than the sum of its proper divisors (79381073790249).

221431416361671 is a wasteful number, since it uses less digits than its factorization.

221431416361671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392650417425.

The product of its digits is 870912, while the sum is 48.

The spelling of 221431416361671 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixteen million, three hundred sixty-one thousand, six hundred seventy-one".