131105225 has 12 divisors (see below), whose sum is σ = 171127440. Its totient is φ = 99363600.

The previous prime is 131105213. The next prime is 131105239. The reversal of 131105225 is 522501131.

It is a happy number.

It is not a de Polignac number, because 131105225 - 2¹⁰ = 131104201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131105197 and 131105206.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137531 + ... + 138480.

It is an arithmetic number, because the mean of its divisors is an integer number (14260620).

Almost surely, 2^131105225 is an apocalyptic number.

It is an amenable number.

131105225 is a deficient number, since it is larger than the sum of its proper divisors (40022215).

131105225 is a wasteful number, since it uses less digits than its factorization.

131105225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276040 (or 276035 counting only the distinct ones).

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

The square root of 131105225 is about 11450.1189950149. The cubic root of 131105225 is about 508.0112540649.

Adding to 131105225 its reverse (522501131), we get a palindrome (653606356).

The spelling of 131105225 in words is "one hundred thirty-one million, one hundred five thousand, two hundred twenty-five".