221442125 has 16 divisors (see below), whose sum is σ = 276833856. Its totient is φ = 176850000.

The previous prime is 221442103. The next prime is 221442149. The reversal of 221442125 is 521244122.

221442125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221442125 - 2⁶ = 221442061 is a prime.

It is a super-2 number, since 2×221442125² = 98073229449031250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221442125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97250 + ... + 99500.

It is an arithmetic number, because the mean of its divisors is an integer number (17302116).

Almost surely, 2^221442125 is an apocalyptic number.

221442125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221442125 is a deficient number, since it is larger than the sum of its proper divisors (55391731).

221442125 is an equidigital number, since it uses as much as digits as its factorization.

221442125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053 (or 3043 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 221442125 is about 14880.9315904617. The cubic root of 221442125 is about 604.9972679338.

Adding to 221442125 its reverse (521244122), we get a palindrome (742686247).

The spelling of 221442125 in words is "two hundred twenty-one million, four hundred forty-two thousand, one hundred twenty-five".