25543243214 has 4 divisors (see below), whose sum is σ = 38314864824. Its totient is φ = 12771621606.

The previous prime is 25543243207. The next prime is 25543243217. The reversal of 25543243214 is 41234234552.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25543243217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6385810802 + ... + 6385810805.

It is an arithmetic number, because the mean of its divisors is an integer number (9578716206).

Almost surely, 2^25543243214 is an apocalyptic number.

25543243214 is a deficient number, since it is larger than the sum of its proper divisors (12771621610).

25543243214 is a wasteful number, since it uses less digits than its factorization.

25543243214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12771621609.

The product of its digits is 115200, while the sum is 35.

Adding to 25543243214 its reverse (41234234552), we get a palindrome (66777477766).

The spelling of 25543243214 in words is "twenty-five billion, five hundred forty-three million, two hundred forty-three thousand, two hundred fourteen".