25053331221 has 12 divisors (see below), whose sum is σ = 36189530572. Its totient is φ = 16701581376.

The previous prime is 25053331213. The next prime is 25053331229. The reversal of 25053331221 is 12213335052.

It is a happy number.

25053331221 is a `hidden beast` number, since 2 + 5 + 0 + 533 + 3 + 122 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (25053331213) and next prime (25053331229).

It can be written as a sum of positive squares in 2 ways, for example, as 18751194225 + 6302136996 = 136935^2 + 79386^2 .

It is not a de Polignac number, because 25053331221 - 2³ = 25053331213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25053331229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 381975 + ... + 442731.

Almost surely, 2^25053331221 is an apocalyptic number.

It is an amenable number.

25053331221 is a deficient number, since it is larger than the sum of its proper divisors (11136199351).

25053331221 is a wasteful number, since it uses less digits than its factorization.

25053331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106580 (or 106577 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 25053331221 its reverse (12213335052), we get a palindrome (37266666273).

The spelling of 25053331221 in words is "twenty-five billion, fifty-three million, three hundred thirty-one thousand, two hundred twenty-one".