25452103021 has 4 divisors (see below), whose sum is σ = 25452661212. Its totient is φ = 25451544832.

The previous prime is 25452103009. The next prime is 25452103031. The reversal of 25452103021 is 12030125452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2264427396 + 23187675625 = 47586^2 + 152275^2 .

It is a cyclic number.

It is not a de Polignac number, because 25452103021 - 2¹⁵ = 25452070253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25452103031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203956 + ... + 304141.

It is an arithmetic number, because the mean of its divisors is an integer number (6363165303).

Almost surely, 2^25452103021 is an apocalyptic number.

It is an amenable number.

25452103021 is a deficient number, since it is larger than the sum of its proper divisors (558191).

25452103021 is an equidigital number, since it uses as much as digits as its factorization.

25452103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558190.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 25452103021 its reverse (12030125452), we get a palindrome (37482228473).

The spelling of 25452103021 in words is "twenty-five billion, four hundred fifty-two million, one hundred three thousand, twenty-one".