225621011 has 16 divisors (see below), whose sum is σ = 281718528. Its totient is φ = 175543200.

The previous prime is 225621001. The next prime is 225621013. The reversal of 225621011 is 110126522.

225621011 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 225621011 - 2¹⁴ = 225604627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225621013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60641 + ... + 64253.

It is an arithmetic number, because the mean of its divisors is an integer number (17607408).

Almost surely, 2^225621011 is an apocalyptic number.

225621011 is a deficient number, since it is larger than the sum of its proper divisors (56097517).

225621011 is a wasteful number, since it uses less digits than its factorization.

225621011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 225621011 is about 15020.6861028383. The cubic root of 225621011 is about 608.7792580248.

Adding to 225621011 its reverse (110126522), we get a palindrome (335747533).

The spelling of 225621011 in words is "two hundred twenty-five million, six hundred twenty-one thousand, eleven".