25820471 has 2 divisors, whose sum is σ = 25820472. Its totient is φ = 25820470.

The previous prime is 25820453. The next prime is 25820477. The reversal of 25820471 is 17402852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25820471 - 2⁶ = 25820407 is a prime.

It is a super-3 number, since 3×25820471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25820477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12910235 + 12910236.

It is an arithmetic number, because the mean of its divisors is an integer number (12910236).

Almost surely, 2^25820471 is an apocalyptic number.

25820471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25820471 is an equidigital number, since it uses as much as digits as its factorization.

25820471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 25820471 is about 5081.3847522108. The cubic root of 25820471 is about 295.5661673305.

The spelling of 25820471 in words is "twenty-five million, eight hundred twenty thousand, four hundred seventy-one".