25055819 has 2 divisors, whose sum is σ = 25055820. Its totient is φ = 25055818.

The previous prime is 25055801. The next prime is 25055827. The reversal of 25055819 is 91855052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25055819 - 2¹² = 25051723 is a prime.

It is a super-2 number, since 2×25055819² = 1255588131521522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25055419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12527909 + 12527910.

It is an arithmetic number, because the mean of its divisors is an integer number (12527910).

Almost surely, 2^25055819 is an apocalyptic number.

25055819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25055819 is an equidigital number, since it uses as much as digits as its factorization.

25055819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The square root of 25055819 is about 5005.5787877128. The cubic root of 25055819 is about 292.6192330516.

The spelling of 25055819 in words is "twenty-five million, fifty-five thousand, eight hundred nineteen".