25500531243 has 16 divisors (see below), whose sum is σ = 37146502656. Its totient is φ = 15432025440.

The previous prime is 25500531241. The next prime is 25500531281. The reversal of 25500531243 is 34213500552.

It is not a de Polignac number, because 25500531243 - 2¹ = 25500531241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25500531243.

It is not an unprimeable number, because it can be changed into a prime (25500531241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 548371 + ... + 593052.

It is an arithmetic number, because the mean of its divisors is an integer number (2321656416).

Almost surely, 2^25500531243 is an apocalyptic number.

25500531243 is a deficient number, since it is larger than the sum of its proper divisors (11645971413).

25500531243 is a wasteful number, since it uses less digits than its factorization.

25500531243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142114.

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 25500531243 in words is "twenty-five billion, five hundred million, five hundred thirty-one thousand, two hundred forty-three".