25242040531 has 16 divisors (see below), whose sum is σ = 26713359360. Its totient is φ = 23785306560.

The previous prime is 25242040511. The next prime is 25242040553. The reversal of 25242040531 is 13504024252.

It is not a de Polignac number, because 25242040531 - 2¹¹ = 25242038483 is a prime.

It is a super-2 number, since 2×25242040531² (a number of 22 digits) contains 22 as substring.

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 25242040531.

It is not an unprimeable number, because it can be changed into a prime (25242040511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3327615 + ... + 3335191.

It is an arithmetic number, because the mean of its divisors is an integer number (1669584960).

Almost surely, 2^25242040531 is an apocalyptic number.

25242040531 is a deficient number, since it is larger than the sum of its proper divisors (1471318829).

25242040531 is a wasteful number, since it uses less digits than its factorization.

25242040531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8514.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 25242040531 its reverse (13504024252), we get a palindrome (38746064783).

The spelling of 25242040531 in words is "twenty-five billion, two hundred forty-two million, forty thousand, five hundred thirty-one".