225105131 has 4 divisors (see below), whose sum is σ = 225216000. Its totient is φ = 224994264.

The previous prime is 225105053. The next prime is 225105157. The reversal of 225105131 is 131501522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131501522 = 2 ⋅65750761.

It is a cyclic number.

It is not a de Polignac number, because 225105131 - 2¹⁰ = 225104107 is a prime.

It is a super-2 number, since 2×225105131² = 101344640005054322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225105031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52331 + ... + 56468.

It is an arithmetic number, because the mean of its divisors is an integer number (56304000).

Almost surely, 2^225105131 is an apocalyptic number.

225105131 is a deficient number, since it is larger than the sum of its proper divisors (110869).

225105131 is a wasteful number, since it uses less digits than its factorization.

225105131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110868.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 225105131 is about 15003.5039574094. The cubic root of 225105131 is about 608.3149148778.

Adding to 225105131 its reverse (131501522), we get a palindrome (356606653).

The spelling of 225105131 in words is "two hundred twenty-five million, one hundred five thousand, one hundred thirty-one".