25213503 has 8 divisors (see below), whose sum is σ = 38420608. Its totient is φ = 14407704.

The previous prime is 25213471. The next prime is 25213519. The reversal of 25213503 is 30531252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25213503 - 2⁵ = 25213471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1200643 = 25213503 / (2 + 5 + 2 + 1 + 3 + 5 + 0 + 3).

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 25213503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25215503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600301 + ... + 600342.

It is an arithmetic number, because the mean of its divisors is an integer number (4802576).

Almost surely, 2^25213503 is an apocalyptic number.

25213503 is a deficient number, since it is larger than the sum of its proper divisors (13207105).

25213503 is a wasteful number, since it uses less digits than its factorization.

25213503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200653.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 25213503 is about 5021.3049100806. The cubic root of 25213503 is about 293.2317975313.

Adding to 25213503 its reverse (30531252), we get a palindrome (55744755).

The spelling of 25213503 in words is "twenty-five million, two hundred thirteen thousand, five hundred three".