221422125 has 32 divisors (see below), whose sum is σ = 369667584. Its totient is φ = 117700800.

The previous prime is 221422111. The next prime is 221422129. The reversal of 221422125 is 521224122.

It is not a de Polignac number, because 221422125 - 2⁸ = 221421869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139084 + ... + 140666.

It is an arithmetic number, because the mean of its divisors is an integer number (11552112).

Almost surely, 2^221422125 is an apocalyptic number.

221422125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221422125 is a deficient number, since it is larger than the sum of its proper divisors (148245459).

221422125 is a wasteful number, since it uses less digits than its factorization.

221422125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974 (or 1964 counting only the distinct ones).

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

The square root of 221422125 is about 14880.2595743488. The cubic root of 221422125 is about 604.9790535288.

Adding to 221422125 its reverse (521224122), we get a palindrome (742646247).

The spelling of 221422125 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred twenty-five".