25212555 has 24 divisors (see below), whose sum is σ = 43943328. Its totient is φ = 13372416.

The previous prime is 25212553. The next prime is 25212559. The reversal of 25212555 is 55521252.

It is not a de Polignac number, because 25212555 - 2¹ = 25212553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25212553) 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 in 23 ways as a sum of consecutive naturals, for example, 7234 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (1830972).

Almost surely, 2^25212555 is an apocalyptic number.

25212555 is a deficient number, since it is larger than the sum of its proper divisors (18730773).

25212555 is a wasteful number, since it uses less digits than its factorization.

25212555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3104 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 25212555 is about 5021.2105114205. The cubic root of 25212555 is about 293.2281224208.

The spelling of 25212555 in words is "twenty-five million, two hundred twelve thousand, five hundred fifty-five".