25220471 has 2 divisors, whose sum is σ = 25220472. Its totient is φ = 25220470.

The previous prime is 25220449. The next prime is 25220479. The reversal of 25220471 is 17402252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25220471 - 2¹⁸ = 24958327 is a prime.

It is a super-3 number, since 3×25220471³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25220479) 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, 12610235 + 12610236.

It is an arithmetic number, because the mean of its divisors is an integer number (12610236).

Almost surely, 2^25220471 is an apocalyptic number.

25220471 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220471 is an equidigital number, since it uses as much as digits as its factorization.

25220471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 25220471 is about 5021.9987056948. The cubic root of 25220471 is about 293.2588075422.

The spelling of 25220471 in words is "twenty-five million, two hundred twenty thousand, four hundred seventy-one".