225215101 has 4 divisors (see below), whose sum is σ = 225352192. Its totient is φ = 225078012.

The previous prime is 225215077. The next prime is 225215119. The reversal of 225215101 is 101512522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225215101 - 2⁷ = 225214973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225215161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66051 + ... + 69376.

It is an arithmetic number, because the mean of its divisors is an integer number (56338048).

Almost surely, 2^225215101 is an apocalyptic number.

It is an amenable number.

225215101 is a deficient number, since it is larger than the sum of its proper divisors (137091).

225215101 is a wasteful number, since it uses less digits than its factorization.

225215101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137090.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 225215101 is about 15007.1683205060. The cubic root of 225215101 is about 608.4139582304.

Adding to 225215101 its reverse (101512522), we get a palindrome (326727623).

The spelling of 225215101 in words is "two hundred twenty-five million, two hundred fifteen thousand, one hundred one".