25986551 has 2 divisors, whose sum is σ = 25986552. Its totient is φ = 25986550.

The previous prime is 25986533. The next prime is 25986559. The reversal of 25986551 is 15568952.

25986551 is nontrivially palindromic in base 14.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25986551 - 2¹⁸ = 25724407 is a prime.

It is a super-4 number, since 4×25986551⁴ (a number of 31 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25986499 and 25986508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25986559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12993275 + 12993276.

It is an arithmetic number, because the mean of its divisors is an integer number (12993276).

Almost surely, 2^25986551 is an apocalyptic number.

25986551 is a deficient number, since it is larger than the sum of its proper divisors (1).

25986551 is an equidigital number, since it uses as much as digits as its factorization.

25986551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 25986551 is about 5097.7005600565. The cubic root of 25986551 is about 296.1985177620.

The spelling of 25986551 in words is "twenty-five million, nine hundred eighty-six thousand, five hundred fifty-one".