25550313133 has 2 divisors, whose sum is σ = 25550313134. Its totient is φ = 25550313132.

The previous prime is 25550313109. The next prime is 25550313199. The reversal of 25550313133 is 33131305552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18069274084 + 7481039049 = 134422^2 + 86493^2 .

It is a cyclic number.

It is not a de Polignac number, because 25550313133 - 2⁹ = 25550312621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25550313095 and 25550313104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25550313433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775156566 + 12775156567.

It is an arithmetic number, because the mean of its divisors is an integer number (12775156567).

Almost surely, 2^25550313133 is an apocalyptic number.

It is an amenable number.

25550313133 is a deficient number, since it is larger than the sum of its proper divisors (1).

25550313133 is an equidigital number, since it uses as much as digits as its factorization.

25550313133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20250, while the sum is 31.

Adding to 25550313133 its reverse (33131305552), we get a palindrome (58681618685).

The spelling of 25550313133 in words is "twenty-five billion, five hundred fifty million, three hundred thirteen thousand, one hundred thirty-three".