25227521442 has 30 divisors (see below), whose sum is σ = 56532865323. Its totient is φ = 8408499948.

The previous prime is 25227521401. The next prime is 25227521447. The reversal of 25227521442 is 24412572252.

25227521442 is a `hidden beast` number, since 2 + 522 + 75 + 21 + 4 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12613760721 + 12613760721 = 112311^2 + 112311^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=112311.

It is a junction number, because it is equal to n+sod(n) for n = 25227521397 and 25227521406.

It is not an unprimeable number, because it can be changed into a prime (25227521447) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2015359 + ... + 2027837.

Almost surely, 2^25227521442 is an apocalyptic number.

25227521442 is an abundant number, since it is smaller than the sum of its proper divisors (31305343881).

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

25227521442 is an frugal number, since it uses more digits than its factorization.

25227521442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24972 (or 12484 counting only the distinct ones).

The product of its digits is 89600, while the sum is 36.

The spelling of 25227521442 in words is "twenty-five billion, two hundred twenty-seven million, five hundred twenty-one thousand, four hundred forty-two".