221431416334455 has 16 divisors (see below), whose sum is σ = 354497574699360. Its totient is φ = 118027652523648.

The previous prime is 221431416334439. The next prime is 221431416334483. The reversal of 221431416334455 is 554433614134122.

It is a happy number.

It is not a de Polignac number, because 221431416334455 - 2⁴ = 221431416334439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4318901932 + ... + 4318953201.

It is an arithmetic number, because the mean of its divisors is an integer number (22156098418710).

Almost surely, 2^{221431416334455} is an apocalyptic number.

221431416334455 is a deficient number, since it is larger than the sum of its proper divisors (133066158364905).

221431416334455 is a wasteful number, since it uses less digits than its factorization.

221431416334455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8637856850.

The product of its digits is 4147200, while the sum is 48.

The spelling of 221431416334455 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixteen million, three hundred thirty-four thousand, four hundred fifty-five".