25250000443 has 4 divisors (see below), whose sum is σ = 25254740448. Its totient is φ = 25245260440.

The previous prime is 25250000437. The next prime is 25250000473. The reversal of 25250000443 is 34400005252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25250000443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25250000423) 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, 2362003 + ... + 2372668.

It is an arithmetic number, because the mean of its divisors is an integer number (6313685112).

Almost surely, 2^25250000443 is an apocalyptic number.

25250000443 is a deficient number, since it is larger than the sum of its proper divisors (4740005).

25250000443 is an equidigital number, since it uses as much as digits as its factorization.

25250000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4740004.

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 25250000443 its reverse (34400005252), we get a palindrome (59650005695).

The spelling of 25250000443 in words is "twenty-five billion, two hundred fifty million, four hundred forty-three", and thus it is an aban number.