225231331 has 4 divisors (see below), whose sum is σ = 242556832. Its totient is φ = 207905832.

The previous prime is 225231319. The next prime is 225231343. The reversal of 225231331 is 133132522.

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

It is an interprime number because it is at equal distance from previous prime (225231319) and next prime (225231343).

It is a cyclic number.

It is not a de Polignac number, because 225231331 - 2⁵ = 225231299 is a prime.

It is a super-2 number, since 2×225231331² = 101458304928063122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225231131) 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, 8662731 + ... + 8662756.

It is an arithmetic number, because the mean of its divisors is an integer number (60639208).

Almost surely, 2^225231331 is an apocalyptic number.

225231331 is a deficient number, since it is larger than the sum of its proper divisors (17325501).

225231331 is a wasteful number, since it uses less digits than its factorization.

225231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17325500.

The product of its digits is 1080, while the sum is 22.

The square root of 225231331 is about 15007.7090523504. The cubic root of 225231331 is about 608.4285728829.

Adding to 225231331 its reverse (133132522), we get a palindrome (358363853).

The spelling of 225231331 in words is "two hundred twenty-five million, two hundred thirty-one thousand, three hundred thirty-one".