25531271 has 2 divisors, whose sum is σ = 25531272. Its totient is φ = 25531270.

The previous prime is 25531249. The next prime is 25531277. The reversal of 25531271 is 17213552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25531271 - 2¹⁰ = 25530247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25531271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25531277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765635 + 12765636.

It is an arithmetic number, because the mean of its divisors is an integer number (12765636).

Almost surely, 2^25531271 is an apocalyptic number.

25531271 is a deficient number, since it is larger than the sum of its proper divisors (1).

25531271 is an equidigital number, since it uses as much as digits as its factorization.

25531271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 26.

The square root of 25531271 is about 5052.8478108884. The cubic root of 25531271 is about 294.4585337140.

The spelling of 25531271 in words is "twenty-five million, five hundred thirty-one thousand, two hundred seventy-one".