210135135025 has 6 divisors (see below), whose sum is σ = 260567567462. Its totient is φ = 168108108000.

The previous prime is 210135135011. The next prime is 210135135043. The reversal of 210135135025 is 520531531012.

210135135025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 22583777841 + 187551357184 = 150279^2 + 433072^2 .

It is not a de Polignac number, because 210135135025 - 2¹⁵ = 210135102257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210135134984 and 210135135002.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4202702676 + ... + 4202702725.

Almost surely, 2^210135135025 is an apocalyptic number.

210135135025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210135135025 is a deficient number, since it is larger than the sum of its proper divisors (50432432437).

210135135025 is an equidigital number, since it uses as much as digits as its factorization.

210135135025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405405411 (or 8405405406 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 210135135025 its reverse (520531531012), we get a palindrome (730666666037).

The spelling of 210135135025 in words is "two hundred ten billion, one hundred thirty-five million, one hundred thirty-five thousand, twenty-five".