221422152 has 32 divisors (see below), whose sum is σ = 632635200. Its totient is φ = 63263424.

The previous prime is 221422141. The next prime is 221422153. The reversal of 221422152 is 251224122.

221422152 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221422152² = 98055538792622208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (221422153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658827 + ... + 659162.

It is an arithmetic number, because the mean of its divisors is an integer number (19769850).

Almost surely, 2^221422152 is an apocalyptic number.

It is an amenable number.

221422152 is an abundant number, since it is smaller than the sum of its proper divisors (411213048).

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

221422152 is a wasteful number, since it uses less digits than its factorization.

221422152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318005 (or 1318001 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 221422152 is about 14880.2604815910. The cubic root of 221422152 is about 604.9790781190.

Adding to 221422152 its reverse (251224122), we get a palindrome (472646274).

The spelling of 221422152 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred fifty-two".