210131023 has 4 divisors (see below), whose sum is σ = 210296088. Its totient is φ = 209965960.

The previous prime is 210130939. The next prime is 210131041. The reversal of 210131023 is 320131012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210131023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210130994 and 210131012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210131063) 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 3 ways as a sum of consecutive naturals, for example, 80608 + ... + 83173.

It is an arithmetic number, because the mean of its divisors is an integer number (52574022).

Almost surely, 2^210131023 is an apocalyptic number.

210131023 is a deficient number, since it is larger than the sum of its proper divisors (165065).

210131023 is a wasteful number, since it uses less digits than its factorization.

210131023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165064.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 210131023 is about 14495.8967642571. The cubic root of 210131023 is about 594.5157871136.

Adding to 210131023 its reverse (320131012), we get a palindrome (530262035).

It can be divided in two parts, 2101 and 31023, that added together give a square (33124 = 182²).

The spelling of 210131023 in words is "two hundred ten million, one hundred thirty-one thousand, twenty-three".