221427573 has 8 divisors (see below), whose sum is σ = 303216288. Its totient is φ = 143628624.

The previous prime is 221427551. The next prime is 221427581. The reversal of 221427573 is 375724122.

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

It is not a de Polignac number, because 221427573 - 2⁵ = 221427541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221427523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997311 + ... + 997532.

It is an arithmetic number, because the mean of its divisors is an integer number (37902036).

Almost surely, 2^221427573 is an apocalyptic number.

It is an amenable number.

221427573 is a deficient number, since it is larger than the sum of its proper divisors (81788715).

221427573 is a wasteful number, since it uses less digits than its factorization.

221427573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994883.

The product of its digits is 23520, while the sum is 33.

The square root of 221427573 is about 14880.4426345455. The cubic root of 221427573 is about 604.9840152414.

The spelling of 221427573 in words is "two hundred twenty-one million, four hundred twenty-seven thousand, five hundred seventy-three".