25530212000 has 96 divisors (see below), whose sum is σ = 64062835200. Its totient is φ = 9994732800.

The previous prime is 25530211981. The next prime is 25530212027. The reversal of 25530212000 is 21203552.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 15 ways as a sum of consecutive naturals, for example, 120101 + ... + 255899.

It is an arithmetic number, because the mean of its divisors is an integer number (667321200).

Almost surely, 2^25530212000 is an apocalyptic number.

25530212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25530212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32031417600).

25530212000 is an abundant number, since it is smaller than the sum of its proper divisors (38532623200).

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

25530212000 is a wasteful number, since it uses less digits than its factorization.

25530212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135871 (or 135853 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 25530212000 its reverse (21203552), we get a palindrome (25551415552).

The spelling of 25530212000 in words is "twenty-five billion, five hundred thirty million, two hundred twelve thousand".