25452021443 has 8 divisors (see below), whose sum is σ = 25597440960. Its totient is φ = 25306655040.

The previous prime is 25452021431. The next prime is 25452021521. The reversal of 25452021443 is 34412025452.

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

It is a cyclic number.

It is not a de Polignac number, because 25452021443 - 2¹⁸ = 25451759299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25452021043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332998 + ... + 1351956.

It is an arithmetic number, because the mean of its divisors is an integer number (3199680120).

Almost surely, 2^25452021443 is an apocalyptic number.

25452021443 is a deficient number, since it is larger than the sum of its proper divisors (145419517).

25452021443 is a wasteful number, since it uses less digits than its factorization.

25452021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26557.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 25452021443 its reverse (34412025452), we get a palindrome (59864046895).

The spelling of 25452021443 in words is "twenty-five billion, four hundred fifty-two million, twenty-one thousand, four hundred forty-three".