25516511 has 2 divisors, whose sum is σ = 25516512. Its totient is φ = 25516510.

The previous prime is 25516489. The next prime is 25516537. The reversal of 25516511 is 11561552.

It is an a-pointer prime, because the next prime (25516537) can be obtained adding 25516511 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25516511 - 2¹⁴ = 25500127 is a prime.

It is a super-2 number, since 2×25516511² = 1302184667226242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25516571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12758255 + 12758256.

It is an arithmetic number, because the mean of its divisors is an integer number (12758256).

Almost surely, 2^25516511 is an apocalyptic number.

25516511 is a deficient number, since it is larger than the sum of its proper divisors (1).

25516511 is an equidigital number, since it uses as much as digits as its factorization.

25516511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 26.

The square root of 25516511 is about 5051.3870372404. The cubic root of 25516511 is about 294.4017791852.

The spelling of 25516511 in words is "twenty-five million, five hundred sixteen thousand, five hundred eleven".