133331425 has 12 divisors (see below), whose sum is σ = 175056876. Its totient is φ = 100390400.

The previous prime is 133331423. The next prime is 133331431. The reversal of 133331425 is 524133331.

It can be written as a sum of positive squares in 6 ways, for example, as 18241441 + 115089984 = 4271^2 + 10728^2 .

It is not a de Polignac number, because 133331425 - 2¹ = 133331423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133331425.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133331423) 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 11 ways as a sum of consecutive naturals, for example, 156436 + ... + 157285.

It is an arithmetic number, because the mean of its divisors is an integer number (14588073).

Almost surely, 2^133331425 is an apocalyptic number.

It is an amenable number.

133331425 is a deficient number, since it is larger than the sum of its proper divisors (41725451).

133331425 is a wasteful number, since it uses less digits than its factorization.

133331425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313748 (or 313743 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 133331425 is about 11546.9227502396. The cubic root of 133331425 is about 510.8705176277.

Adding to 133331425 its reverse (524133331), we get a palindrome (657464756).

The spelling of 133331425 in words is "one hundred thirty-three million, three hundred thirty-one thousand, four hundred twenty-five".