25007221008 has 180 divisors, whose sum is σ = 87916081344. Its totient is φ = 6495350400.

The previous prime is 25007221003. The next prime is 25007221009. The reversal of 25007221008 is 80012270052.

It is a super-2 number, since 2×25007221008² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25007221003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19453 + ... + 224483.

Almost surely, 2^25007221008 is an apocalyptic number.

25007221008 is a gapful number since it is divisible by the number (28) 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 25007221008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43958040672).

25007221008 is an abundant number, since it is smaller than the sum of its proper divisors (62908860336).

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

25007221008 is a wasteful number, since it uses less digits than its factorization.

25007221008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205074 (or 205054 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 25007221008 in words is "twenty-five billion, seven million, two hundred twenty-one thousand, eight".