25431250212 has 60 divisors (see below), whose sum is σ = 66583754160. Its totient is φ = 8464148784.

The previous prime is 25431250171. The next prime is 25431250223. The reversal of 25431250212 is 21205213452.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 153963 + ... + 273069.

It is an arithmetic number, because the mean of its divisors is an integer number (1109729236).

Almost surely, 2^25431250212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25431250212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33291877080).

25431250212 is an abundant number, since it is smaller than the sum of its proper divisors (41152503948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25431250212 is a wasteful number, since it uses less digits than its factorization.

25431250212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119782 (or 119771 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 25431250212 its reverse (21205213452), we get a palindrome (46636463664).

The spelling of 25431250212 in words is "twenty-five billion, four hundred thirty-one million, two hundred fifty thousand, two hundred twelve".