25400051 has 2 divisors, whose sum is σ = 25400052. Its totient is φ = 25400050.

The previous prime is 25400047. The next prime is 25400059. The reversal of 25400051 is 15000452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25400051 - 2² = 25400047 is a prime.

It is not a weakly prime, because it can be changed into another prime (25400059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700025 + 12700026.

It is an arithmetic number, because the mean of its divisors is an integer number (12700026).

Almost surely, 2^25400051 is an apocalyptic number.

25400051 is a deficient number, since it is larger than the sum of its proper divisors (1).

25400051 is an equidigital number, since it uses as much as digits as its factorization.

25400051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 25400051 is about 5039.8463270223. The cubic root of 25400051 is about 293.9532026337.

The spelling of 25400051 in words is "twenty-five million, four hundred thousand, fifty-one".