25530511 has 2 divisors, whose sum is σ = 25530512. Its totient is φ = 25530510.

The previous prime is 25530493. The next prime is 25530517. The reversal of 25530511 is 11503552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25530511 - 2⁷ = 25530383 is a prime.

It is a super-2 number, since 2×25530511² = 1303613983842242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25530517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12765255 + 12765256.

It is an arithmetic number, because the mean of its divisors is an integer number (12765256).

Almost surely, 2^25530511 is an apocalyptic number.

25530511 is a deficient number, since it is larger than the sum of its proper divisors (1).

25530511 is an equidigital number, since it uses as much as digits as its factorization.

25530511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 25530511 is about 5052.7726052139. The cubic root of 25530511 is about 294.4556119283.

The spelling of 25530511 in words is "twenty-five million, five hundred thirty thousand, five hundred eleven".