221572015493 has 8 divisors (see below), whose sum is σ = 231742031616. Its totient is φ = 211446703600.

The previous prime is 221572015477. The next prime is 221572015499. The reversal of 221572015493 is 394510275122.

It is a happy number.

221572015493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221572015493 - 2⁴ = 221572015477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221572015493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221572015499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11165918 + ... + 11185743.

It is an arithmetic number, because the mean of its divisors is an integer number (28967753952).

Almost surely, 2^221572015493 is an apocalyptic number.

221572015493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

221572015493 is a deficient number, since it is larger than the sum of its proper divisors (10170016123).

221572015493 is a wasteful number, since it uses less digits than its factorization.

221572015493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22352115.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 221572015493 in words is "two hundred twenty-one billion, five hundred seventy-two million, fifteen thousand, four hundred ninety-three".