25131442054541 has 4 divisors (see below), whose sum is σ = 25134698695932. Its totient is φ = 25128185413152.

The previous prime is 25131442054519. The next prime is 25131442054567. The reversal of 25131442054541 is 14545024413152.

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 19301559369316 + 5829882685225 = 4393354^2 + 2414515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25131442054541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131442054591) 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, 1628309120 + ... + 1628324553.

It is an arithmetic number, because the mean of its divisors is an integer number (6283674673983).

Almost surely, 2^{25131442054541} is an apocalyptic number.

It is an amenable number.

25131442054541 is a deficient number, since it is larger than the sum of its proper divisors (3256641391).

25131442054541 is an equidigital number, since it uses as much as digits as its factorization.

25131442054541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256641390.

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 25131442054541 its reverse (14545024413152), we get a palindrome (39676466467693).

The spelling of 25131442054541 in words is "twenty-five trillion, one hundred thirty-one billion, four hundred forty-two million, fifty-four thousand, five hundred forty-one".