25025053021 has 2 divisors, whose sum is σ = 25025053022. Its totient is φ = 25025053020.

The previous prime is 25025053003. The next prime is 25025053033. The reversal of 25025053021 is 12035052052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21981324121 + 3043728900 = 148261^2 + 55170^2 .

It is a cyclic number.

It is not a de Polignac number, because 25025053021 - 2¹⁷ = 25024921949 is a prime.

It is a super-2 number, since 2×25025053021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25025053051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12512526510 + 12512526511.

It is an arithmetic number, because the mean of its divisors is an integer number (12512526511).

Almost surely, 2^25025053021 is an apocalyptic number.

It is an amenable number.

25025053021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25025053021 is an equidigital number, since it uses as much as digits as its factorization.

25025053021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 25025053021 in words is "twenty-five billion, twenty-five million, fifty-three thousand, twenty-one".