249231857525 has 12 divisors (see below), whose sum is σ = 353197146912. Its totient is φ = 170901845040.

The previous prime is 249231857519. The next prime is 249231857533. The reversal of 249231857525 is 525758132942.

249231857525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-249231857525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 712090847 + ... + 712091196.

It is an arithmetic number, because the mean of its divisors is an integer number (29433095576).

Almost surely, 2^249231857525 is an apocalyptic number.

249231857525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

249231857525 is a deficient number, since it is larger than the sum of its proper divisors (103965289387).

249231857525 is a wasteful number, since it uses less digits than its factorization.

249231857525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424182060 (or 1424182055 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 53.

The spelling of 249231857525 in words is "two hundred forty-nine billion, two hundred thirty-one million, eight hundred fifty-seven thousand, five hundred twenty-five".