225231553 has 4 divisors (see below), whose sum is σ = 225328068. Its totient is φ = 225135040.

The previous prime is 225231541. The next prime is 225231557. The reversal of 225231553 is 355132522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355132522 = 2 ⋅177566261.

It can be written as a sum of positive squares in 2 ways, for example, as 33907329 + 191324224 = 5823^2 + 13832^2 .

It is a cyclic number.

It is not a de Polignac number, because 225231553 - 2¹⁷ = 225100481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225231557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44668 + ... + 49453.

It is an arithmetic number, because the mean of its divisors is an integer number (56332017).

Almost surely, 2^225231553 is an apocalyptic number.

It is an amenable number.

225231553 is a deficient number, since it is larger than the sum of its proper divisors (96515).

225231553 is an equidigital number, since it uses as much as digits as its factorization.

225231553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96514.

The product of its digits is 9000, while the sum is 28.

The square root of 225231553 is about 15007.7164485474. The cubic root of 225231553 is about 608.4287727827.

The spelling of 225231553 in words is "two hundred twenty-five million, two hundred thirty-one thousand, five hundred fifty-three".