25531005 has 16 divisors (see below), whose sum is σ = 41065920. Its totient is φ = 13544448.

The previous prime is 25530997. The next prime is 25531013. The reversal of 25531005 is 50013552.

It is an interprime number because it is at equal distance from previous prime (25530997) and next prime (25531013).

It is not a de Polignac number, because 25531005 - 2³ = 25530997 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1515 + ... + 7304.

It is an arithmetic number, because the mean of its divisors is an integer number (2566620).

Almost surely, 2^25531005 is an apocalyptic number.

It is an amenable number.

25531005 is a deficient number, since it is larger than the sum of its proper divisors (15534915).

25531005 is a wasteful number, since it uses less digits than its factorization.

25531005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9020.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 25531005 is about 5052.8214890297. The cubic root of 25531005 is about 294.4575110956.

Adding to 25531005 its reverse (50013552), we get a palindrome (75544557).

The spelling of 25531005 in words is "twenty-five million, five hundred thirty-one thousand, five".