25211324545243 has 4 divisors (see below), whose sum is σ = 25212054306400. Its totient is φ = 25210594784088.

The previous prime is 25211324545223. The next prime is 25211324545261. The reversal of 25211324545243 is 34254542311252.

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-25211324545243 is a prime.

It is a super-2 number, since 2×25211324545243² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25211324545243.

It is not an unprimeable number, because it can be changed into a prime (25211324545223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364828755 + ... + 364897852.

It is an arithmetic number, because the mean of its divisors is an integer number (6303013576600).

Almost surely, 2^{25211324545243} is an apocalyptic number.

25211324545243 is a deficient number, since it is larger than the sum of its proper divisors (729761157).

25211324545243 is an equidigital number, since it uses as much as digits as its factorization.

25211324545243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729761156.

The product of its digits is 1152000, while the sum is 43.

Adding to 25211324545243 its reverse (34254542311252), we get a palindrome (59465866856495).

The spelling of 25211324545243 in words is "twenty-five trillion, two hundred eleven billion, three hundred twenty-four million, five hundred forty-five thousand, two hundred forty-three".