25052323530 has 128 divisors (see below), whose sum is σ = 69101641728. Its totient is φ = 5758083072.

The previous prime is 25052323463. The next prime is 25052323531. The reversal of 25052323530 is 3532325052.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (25052323531) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 827134 + ... + 856886.

It is an arithmetic number, because the mean of its divisors is an integer number (539856576).

Almost surely, 2^25052323530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25052323530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34550820864).

25052323530 is an abundant number, since it is smaller than the sum of its proper divisors (44049318198).

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

25052323530 is a wasteful number, since it uses less digits than its factorization.

25052323530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29920.

The product of its (nonzero) digits is 27000, while the sum is 30.

Adding to 25052323530 its reverse (3532325052), we get a palindrome (28584648582).

The spelling of 25052323530 in words is "twenty-five billion, fifty-two million, three hundred twenty-three thousand, five hundred thirty".