25505011 has 12 divisors (see below), whose sum is σ = 30766512. Its totient is φ = 20708784.

The previous prime is 25505003. The next prime is 25505017. The reversal of 25505011 is 11050552.

It is not a de Polignac number, because 25505011 - 2³ = 25505003 is a prime.

It is a super-2 number, since 2×25505011² = 1301011172220242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 25505011.

It is not an unprimeable number, because it can be changed into a prime (25505017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2520 + ... + 7573.

It is an arithmetic number, because the mean of its divisors is an integer number (2563876).

Almost surely, 2^25505011 is an apocalyptic number.

25505011 is a deficient number, since it is larger than the sum of its proper divisors (5261501).

25505011 is a wasteful number, since it uses less digits than its factorization.

25505011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10138 (or 10119 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 25505011 is about 5050.2486077420. The cubic root of 25505011 is about 294.3575446997.

Adding to 25505011 its reverse (11050552), we get a palindrome (36555563).

The spelling of 25505011 in words is "twenty-five million, five hundred five thousand, eleven".