25240525220 has 48 divisors (see below), whose sum is σ = 55372923648. Its totient is φ = 9646200960.

The previous prime is 25240525217. The next prime is 25240525249. The reversal of 25240525220 is 2252504252.

It is a super-2 number, since 2×25240525220² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377090 + ... + 438950.

It is an arithmetic number, because the mean of its divisors is an integer number (1153602576).

Almost surely, 2^25240525220 is an apocalyptic number.

25240525220 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 25240525220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27686461824).

25240525220 is an abundant number, since it is smaller than the sum of its proper divisors (30132398428).

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

25240525220 is a wasteful number, since it uses less digits than its factorization.

25240525220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62780 (or 62778 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 29.

The spelling of 25240525220 in words is "twenty-five billion, two hundred forty million, five hundred twenty-five thousand, two hundred twenty".