210138875 has 16 divisors (see below), whose sum is σ = 263014752. Its totient is φ = 167623200.

The previous prime is 210138823. The next prime is 210138881. The reversal of 210138875 is 578831012.

It is not a de Polignac number, because 210138875 - 2⁸ = 210138619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 44372 + ... + 48878.

It is an arithmetic number, because the mean of its divisors is an integer number (16438422).

Almost surely, 2^210138875 is an apocalyptic number.

210138875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

210138875 is a deficient number, since it is larger than the sum of its proper divisors (52875877).

210138875 is an equidigital number, since it uses as much as digits as its factorization.

210138875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4895 (or 4885 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 210138875 is about 14496.1675969892. The cubic root of 210138875 is about 594.5231921439.

Adding to 210138875 its reverse (578831012), we get a palindrome (788969887).

The spelling of 210138875 in words is "two hundred ten million, one hundred thirty-eight thousand, eight hundred seventy-five".