221142564454 has 16 divisors (see below), whose sum is σ = 384294712608. Its totient is φ = 93477091392.

The previous prime is 221142564443. The next prime is 221142564493. The reversal of 221142564454 is 454465241122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108190057 + ... + 108192100.

It is an arithmetic number, because the mean of its divisors is an integer number (24018419538).

Almost surely, 2^221142564454 is an apocalyptic number.

221142564454 is a deficient number, since it is larger than the sum of its proper divisors (163152148154).

221142564454 is a wasteful number, since it uses less digits than its factorization.

221142564454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216382239.

The product of its digits is 307200, while the sum is 40.

The spelling of 221142564454 in words is "two hundred twenty-one billion, one hundred forty-two million, five hundred sixty-four thousand, four hundred fifty-four".