25522250520 has 256 divisors, whose sum is σ = 83790120960. Its totient is φ = 6181650432.

The previous prime is 25522250513. The next prime is 25522250527. The reversal of 25522250520 is 2505222552.

It is an interprime number because it is at equal distance from previous prime (25522250513) and next prime (25522250527).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25522250527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31010829 + ... + 31011651.

It is an arithmetic number, because the mean of its divisors is an integer number (327305160).

Almost surely, 2^25522250520 is an apocalyptic number.

25522250520 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 25522250520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41895060480).

25522250520 is an abundant number, since it is smaller than the sum of its proper divisors (58267870440).

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

25522250520 is a wasteful number, since it uses less digits than its factorization.

25522250520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The spelling of 25522250520 in words is "twenty-five billion, five hundred twenty-two million, two hundred fifty thousand, five hundred twenty".