221432747403493 has 8 divisors (see below), whose sum is σ = 222256593408600. Its totient is φ = 220608906405888.

The previous prime is 221432747403409. The next prime is 221432747403509. The reversal of 221432747403493 is 394304747234122.

It can be written as a sum of positive squares in 4 ways, for example, as 8439943004964 + 212992804398529 = 2905158^2 + 14594273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221432747403493 - 2¹⁷ = 221432747272421 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 (221432747493493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103683205 + ... + 105797317.

It is an arithmetic number, because the mean of its divisors is an integer number (27782074176075).

Almost surely, 2^{221432747403493} is an apocalyptic number.

It is an amenable number.

221432747403493 is a deficient number, since it is larger than the sum of its proper divisors (823846005107).

221432747403493 is a wasteful number, since it uses less digits than its factorization.

221432747403493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503751.

The product of its (nonzero) digits is 24385536, while the sum is 55.

The spelling of 221432747403493 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, seven hundred forty-seven million, four hundred three thousand, four hundred ninety-three".