25517263 has 2 divisors, whose sum is σ = 25517264. Its totient is φ = 25517262.

The previous prime is 25517257. The next prime is 25517291. The reversal of 25517263 is 36271552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25517263 - 2¹⁷ = 25386191 is a prime.

It is a super-2 number, since 2×25517263² = 1302261422022338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25017263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12758631 + 12758632.

It is an arithmetic number, because the mean of its divisors is an integer number (12758632).

Almost surely, 2^25517263 is an apocalyptic number.

25517263 is a deficient number, since it is larger than the sum of its proper divisors (1).

25517263 is an equidigital number, since it uses as much as digits as its factorization.

25517263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 25517263 is about 5051.4614716931. The cubic root of 25517263 is about 294.4046712729.

The spelling of 25517263 in words is "twenty-five million, five hundred seventeen thousand, two hundred sixty-three".