221425010 has 16 divisors (see below), whose sum is σ = 408286872. Its totient is φ = 86409600.

The previous prime is 221424997. The next prime is 221425021. The reversal of 221425010 is 10524122.

It can be written as a sum of positive squares in 4 ways, for example, as 62236321 + 159188689 = 7889^2 + 12617^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221425010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269621 + ... + 270440.

Almost surely, 2^221425010 is an apocalyptic number.

221425010 is a deficient number, since it is larger than the sum of its proper divisors (186861862).

221425010 is a wasteful number, since it uses less digits than its factorization.

221425010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540109.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 221425010 is about 14880.3565145463. The cubic root of 221425010 is about 604.9816810244.

Adding to 221425010 its reverse (10524122), we get a palindrome (231949132).

The spelling of 221425010 in words is "two hundred twenty-one million, four hundred twenty-five thousand, ten".