225231101 has 4 divisors (see below), whose sum is σ = 226665852. Its totient is φ = 223796352.

The previous prime is 225231091. The next prime is 225231103. The reversal of 225231101 is 101132522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130188100 + 95043001 = 11410^2 + 9749^2 .

It is a cyclic number.

It is not a de Polignac number, because 225231101 - 2¹⁰ = 225230077 is a prime.

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 225231101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225231103) 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, 717140 + ... + 717453.

It is an arithmetic number, because the mean of its divisors is an integer number (56666463).

Almost surely, 2^225231101 is an apocalyptic number.

It is an amenable number.

225231101 is a deficient number, since it is larger than the sum of its proper divisors (1434751).

225231101 is a wasteful number, since it uses less digits than its factorization.

225231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434750.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 225231101 is about 15007.7013896199. The cubic root of 225231101 is about 608.4283657794.

Adding to 225231101 its reverse (101132522), we get a palindrome (326363623).

The spelling of 225231101 in words is "two hundred twenty-five million, two hundred thirty-one thousand, one hundred one".