25172533 has 4 divisors (see below), whose sum is σ = 25421868. Its totient is φ = 24923200.

The previous prime is 25172491. The next prime is 25172561. The reversal of 25172533 is 33527152.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16184529 + 8988004 = 4023^2 + 2998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25172573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124516 + ... + 124717.

It is an arithmetic number, because the mean of its divisors is an integer number (6355467).

Almost surely, 2^25172533 is an apocalyptic number.

It is an amenable number.

25172533 is a deficient number, since it is larger than the sum of its proper divisors (249335).

25172533 is a wasteful number, since it uses less digits than its factorization.

25172533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249334.

The product of its digits is 6300, while the sum is 28.

The square root of 25172533 is about 5017.2236346410. The cubic root of 25172533 is about 293.0728850663.

Adding to 25172533 its reverse (33527152), we get a palindrome (58699685).

It can be divided in two parts, 2517 and 2533, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 25172533 in words is "twenty-five million, one hundred seventy-two thousand, five hundred thirty-three".