25451851 has 2 divisors, whose sum is σ = 25451852. Its totient is φ = 25451850.

The previous prime is 25451801. The next prime is 25451861. The reversal of 25451851 is 15815452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25451851 - 2⁹ = 25451339 is a prime.

It is not a weakly prime, because it can be changed into another prime (25451801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12725925 + 12725926.

It is an arithmetic number, because the mean of its divisors is an integer number (12725926).

Almost surely, 2^25451851 is an apocalyptic number.

25451851 is a deficient number, since it is larger than the sum of its proper divisors (1).

25451851 is an equidigital number, since it uses as much as digits as its factorization.

25451851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8000, while the sum is 31.

The square root of 25451851 is about 5044.9827551737. The cubic root of 25451851 is about 294.1528930020.

The spelling of 25451851 in words is "twenty-five million, four hundred fifty-one thousand, eight hundred fifty-one".