221421255544719 has 16 divisors (see below), whose sum is σ = 330233043324000. Its totient is φ = 146623471230528.

The previous prime is 221421255544717. The next prime is 221421255544787. The reversal of 221421255544719 is 917445552124122.

221421255544719 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 2 + 1 + 25 + 5 + 544 + 71 + 9 = 666.

221421255544719 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221421255544719 - 2¹ = 221421255544717 is a prime.

It is a super-2 number, since 2×221421255544719² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421255544717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27519416254 + ... + 27519424299.

It is an arithmetic number, because the mean of its divisors is an integer number (20639565207750).

Almost surely, 2^{221421255544719} is an apocalyptic number.

221421255544719 is a deficient number, since it is larger than the sum of its proper divisors (108811787779281).

221421255544719 is a wasteful number, since it uses less digits than its factorization.

221421255544719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55038840711 (or 55038840705 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 221421255544719 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred fifty-five million, five hundred forty-four thousand, seven hundred nineteen".