221142564453 has 4 divisors (see below), whose sum is σ = 294856752608. Its totient is φ = 147428376300.

The previous prime is 221142564443. The next prime is 221142564493. The reversal of 221142564453 is 354465241122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221142564453 - 2⁴ = 221142564437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221142564443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36857094073 + ... + 36857094078.

It is an arithmetic number, because the mean of its divisors is an integer number (73714188152).

Almost surely, 2^221142564453 is an apocalyptic number.

It is an amenable number.

221142564453 is a deficient number, since it is larger than the sum of its proper divisors (73714188155).

221142564453 is an equidigital number, since it uses as much as digits as its factorization.

221142564453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73714188154.

The product of its digits is 230400, while the sum is 39.

The spelling of 221142564453 in words is "two hundred twenty-one billion, one hundred forty-two million, five hundred sixty-four thousand, four hundred fifty-three".