210131243 has 8 divisors (see below), whose sum is σ = 250591488. Its totient is φ = 172281384.

The previous prime is 210131221. The next prime is 210131249. The reversal of 210131243 is 342131012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210131243 - 2¹² = 210127147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210131249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 652421 + ... + 652742.

It is an arithmetic number, because the mean of its divisors is an integer number (31323936).

Almost surely, 2^210131243 is an apocalyptic number.

210131243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

210131243 is a deficient number, since it is larger than the sum of its proper divisors (40460245).

210131243 is a wasteful number, since it uses less digits than its factorization.

210131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305193.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 210131243 is about 14495.9043526094. The cubic root of 210131243 is about 594.5159945927.

Adding to 210131243 its reverse (342131012), we get a palindrome (552262255).

The spelling of 210131243 in words is "two hundred ten million, one hundred thirty-one thousand, two hundred forty-three".