221431135446543 has 32 divisors (see below), whose sum is σ = 331297824314880. Its totient is φ = 130371828082560.

The previous prime is 221431135446539. The next prime is 221431135446589. The reversal of 221431135446543 is 345644531134122.

It is a happy number.

It is not a de Polignac number, because 221431135446543 - 2² = 221431135446539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221431135446492 and 221431135446501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431135446643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139358608 + ... + 140938581.

It is an arithmetic number, because the mean of its divisors is an integer number (10353057009840).

Almost surely, 2^{221431135446543} is an apocalyptic number.

221431135446543 is a deficient number, since it is larger than the sum of its proper divisors (109866688868337).

221431135446543 is a wasteful number, since it uses less digits than its factorization.

221431135446543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280297887.

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

The spelling of 221431135446543 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, one hundred thirty-five million, four hundred forty-six thousand, five hundred forty-three".