221425043 has 12 divisors (see below), whose sum is σ = 257944848. Its totient is φ = 186195360.

The previous prime is 221425021. The next prime is 221425079. The reversal of 221425043 is 340524122.

It is a happy number.

It is not a de Polignac number, because 221425043 - 2⁸ = 221424787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221425093) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14033 + ... + 25293.

It is an arithmetic number, because the mean of its divisors is an integer number (21495404).

Almost surely, 2^221425043 is an apocalyptic number.

221425043 is a deficient number, since it is larger than the sum of its proper divisors (36519805).

221425043 is an equidigital number, since it uses as much as digits as its factorization.

221425043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11374 (or 11321 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 221425043 is about 14880.3576233906. The cubic root of 221425043 is about 604.9817110789.

Adding to 221425043 its reverse (340524122), we get a palindrome (561949165).

The spelling of 221425043 in words is "two hundred twenty-one million, four hundred twenty-five thousand, forty-three".