221336025 has 24 divisors (see below), whose sum is σ = 366387264. Its totient is φ = 117902400.

The previous prime is 221336023. The next prime is 221336029. The reversal of 221336025 is 520633122.

221336025 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 221336025 - 2¹ = 221336023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221335986 and 221336004.

It is not an unprimeable number, because it can be changed into a prime (221336023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94620 + ... + 96930.

It is an arithmetic number, because the mean of its divisors is an integer number (15266136).

Almost surely, 2^221336025 is an apocalyptic number.

221336025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221336025 is a deficient number, since it is larger than the sum of its proper divisors (145051239).

221336025 is a wasteful number, since it uses less digits than its factorization.

221336025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 221336025 is about 14877.3661983565. The cubic root of 221336025 is about 604.9006279883.

Adding to 221336025 its reverse (520633122), we get a palindrome (741969147).

The spelling of 221336025 in words is "two hundred twenty-one million, three hundred thirty-six thousand, twenty-five".