25155140251 has 2 divisors, whose sum is σ = 25155140252. Its totient is φ = 25155140250.

The previous prime is 25155140239. The next prime is 25155140327. The reversal of 25155140251 is 15204155152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25155140251 is a prime.

It is not a weakly prime, because it can be changed into another prime (25155140951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577570125 + 12577570126.

It is an arithmetic number, because the mean of its divisors is an integer number (12577570126).

Almost surely, 2^25155140251 is an apocalyptic number.

25155140251 is a deficient number, since it is larger than the sum of its proper divisors (1).

25155140251 is an equidigital number, since it uses as much as digits as its factorization.

25155140251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 25155140251 in words is "twenty-five billion, one hundred fifty-five million, one hundred forty thousand, two hundred fifty-one".