221227072 has 28 divisors (see below), whose sum is σ = 478907856. Its totient is φ = 100557440.

The previous prime is 221227063. The next prime is 221227079. The reversal of 221227072 is 270722122.

It is not an unprimeable number, because it can be changed into a prime (221227079) 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, 156418 + ... + 157825.

It is an arithmetic number, because the mean of its divisors is an integer number (17103852).

Almost surely, 2^221227072 is an apocalyptic number.

221227072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221227072 is an abundant number, since it is smaller than the sum of its proper divisors (257680784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221227072 is a wasteful number, since it uses less digits than its factorization.

221227072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314266 (or 314256 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 221227072 is about 14873.7040443865. The cubic root of 221227072 is about 604.8013572751.

Adding to 221227072 its reverse (270722122), we get a palindrome (491949194).

The spelling of 221227072 in words is "two hundred twenty-one million, two hundred twenty-seven thousand, seventy-two".