25250251442 has 8 divisors (see below), whose sum is σ = 40788867756. Its totient is φ = 11653962192.

The previous prime is 25250251427. The next prime is 25250251501. The reversal of 25250251442 is 24415205252.

It can be written as a sum of positive squares in 2 ways, for example, as 24538909201 + 711342241 = 156649^2 + 26671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25250251399 and 25250251408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485581733 + ... + 485581784.

Almost surely, 2^25250251442 is an apocalyptic number.

25250251442 is a deficient number, since it is larger than the sum of its proper divisors (15538616314).

25250251442 is a wasteful number, since it uses less digits than its factorization.

25250251442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971163532.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 25250251442 its reverse (24415205252), we get a palindrome (49665456694).

The spelling of 25250251442 in words is "twenty-five billion, two hundred fifty million, two hundred fifty-one thousand, four hundred forty-two".