25543048213 has 2 divisors, whose sum is σ = 25543048214. Its totient is φ = 25543048212.

The previous prime is 25543048189. The next prime is 25543048241. The reversal of 25543048213 is 31284034552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24013221444 + 1529826769 = 154962^2 + 39113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25543048213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25543048273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771524106 + 12771524107.

It is an arithmetic number, because the mean of its divisors is an integer number (12771524107).

Almost surely, 2^25543048213 is an apocalyptic number.

It is an amenable number.

25543048213 is a deficient number, since it is larger than the sum of its proper divisors (1).

25543048213 is an equidigital number, since it uses as much as digits as its factorization.

25543048213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 25543048213 in words is "twenty-five billion, five hundred forty-three million, forty-eight thousand, two hundred thirteen".