25222502000 has 80 divisors (see below), whose sum is σ = 61103362944. Its totient is φ = 10069920000.

The previous prime is 25222501999. The next prime is 25222502017. The reversal of 25222502000 is 20522252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1070345 + ... + 1093655.

Almost surely, 2^25222502000 is an apocalyptic number.

25222502000 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 25222502000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30551681472).

25222502000 is an abundant number, since it is smaller than the sum of its proper divisors (35880860944).

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

25222502000 is a wasteful number, since it uses less digits than its factorization.

25222502000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23875 (or 23859 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The spelling of 25222502000 in words is "twenty-five billion, two hundred twenty-two million, five hundred two thousand".