210243129 has 4 divisors (see below), whose sum is σ = 280324176. Its totient is φ = 140162084.

The previous prime is 210243107. The next prime is 210243133. The reversal of 210243129 is 921342012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210243129 - 2⁸ = 210242873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210243099 and 210243108.

It is not an unprimeable number, because it can be changed into a prime (210243629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35040519 + ... + 35040524.

It is an arithmetic number, because the mean of its divisors is an integer number (70081044).

Almost surely, 2^210243129 is an apocalyptic number.

It is an amenable number.

210243129 is a deficient number, since it is larger than the sum of its proper divisors (70081047).

210243129 is an equidigital number, since it uses as much as digits as its factorization.

210243129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70081046.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 210243129 is about 14499.7630670298. The cubic root of 210243129 is about 594.6214940782.

The spelling of 210243129 in words is "two hundred ten million, two hundred forty-three thousand, one hundred twenty-nine".