25505007 has 24 divisors (see below), whose sum is σ = 38463360. Its totient is φ = 14908320.

The previous prime is 25505003. The next prime is 25505017. The reversal of 25505007 is 70050552.

It is not a de Polignac number, because 25505007 - 2² = 25505003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27294 + ... + 28212.

It is an arithmetic number, because the mean of its divisors is an integer number (1602640).

Almost surely, 2^25505007 is an apocalyptic number.

25505007 is a deficient number, since it is larger than the sum of its proper divisors (12958353).

25505007 is a wasteful number, since it uses less digits than its factorization.

25505007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 25505007 is about 5050.2482117219. The cubic root of 25505007 is about 294.3575293115.

Adding to 25505007 its reverse (70050552), we get a palindrome (95555559).

It can be divided in two parts, 2550 and 5007, that added together give a palindrome (7557).

The spelling of 25505007 in words is "twenty-five million, five hundred five thousand, seven".