133315225 has 6 divisors (see below), whose sum is σ = 165310910. Its totient is φ = 106652160.

The previous prime is 133315211. The next prime is 133315271. The reversal of 133315225 is 522513331.

It can be written as a sum of positive squares in 3 ways, for example, as 2350089 + 130965136 = 1533^2 + 11444^2 .

It is not a de Polignac number, because 133315225 - 2¹³ = 133307033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 5332609 = 133315225 / (1 + 3 + 3 + 3 + 1 + 5 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 133315225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2666280 + ... + 2666329.

Almost surely, 2^133315225 is an apocalyptic number.

It is an amenable number.

133315225 is a deficient number, since it is larger than the sum of its proper divisors (31995685).

133315225 is an equidigital number, since it uses as much as digits as its factorization.

133315225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332619 (or 5332614 counting only the distinct ones).

The product of its digits is 2700, while the sum is 25.

The square root of 133315225 is about 11546.2212433332. The cubic root of 133315225 is about 510.8498262376.

Adding to 133315225 its reverse (522513331), we get a palindrome (655828556).

The spelling of 133315225 in words is "one hundred thirty-three million, three hundred fifteen thousand, two hundred twenty-five".