25952221 has 8 divisors (see below), whose sum is σ = 26672184. Its totient is φ = 25236480.

The previous prime is 25952209. The next prime is 25952237. The reversal of 25952221 is 12225952.

It can be written as a sum of positive squares in 4 ways, for example, as 4468996 + 21483225 = 2114^2 + 4635^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25952221 - 2⁷ = 25952093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25952221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25952261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14445 + ... + 16141.

It is an arithmetic number, because the mean of its divisors is an integer number (3334023).

Almost surely, 2^25952221 is an apocalyptic number.

It is an amenable number.

25952221 is a deficient number, since it is larger than the sum of its proper divisors (719963).

25952221 is a wasteful number, since it uses less digits than its factorization.

25952221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its digits is 3600, while the sum is 28.

The square root of 25952221 is about 5094.3322427969. The cubic root of 25952221 is about 296.0680274921.

The spelling of 25952221 in words is "twenty-five million, nine hundred fifty-two thousand, two hundred twenty-one".