25523001 has 24 divisors (see below), whose sum is σ = 44613504. Its totient is φ = 13726080.

The previous prime is 25522979. The next prime is 25523011. The reversal of 25523001 is 10032552.

It is a happy number.

It is not a de Polignac number, because 25523001 - 2⁵ = 25522969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25523011) 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 23 ways as a sum of consecutive naturals, for example, 10845 + ... + 12986.

It is an arithmetic number, because the mean of its divisors is an integer number (1858896).

Almost surely, 2^25523001 is an apocalyptic number.

25523001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25523001 is a deficient number, since it is larger than the sum of its proper divisors (19090503).

25523001 is a wasteful number, since it uses less digits than its factorization.

25523001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23861 (or 23858 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25523001 is about 5052.0293942138. The cubic root of 25523001 is about 294.4267369544.

Adding to 25523001 its reverse (10032552), we get a palindrome (35555553).

The spelling of 25523001 in words is "twenty-five million, five hundred twenty-three thousand, one".