210100023 has 48 divisors (see below), whose sum is σ = 358952256. Its totient is φ = 115914240.

The previous prime is 210100013. The next prime is 210100057. The reversal of 210100023 is 320001012.

It is a happy number.

It is not a de Polignac number, because 210100023 - 2⁶ = 210099959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210099978 and 210100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100013) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 403003 + ... + 403523.

It is an arithmetic number, because the mean of its divisors is an integer number (7478172).

Almost surely, 2^210100023 is an apocalyptic number.

210100023 is a deficient number, since it is larger than the sum of its proper divisors (148852233).

210100023 is a wasteful number, since it uses less digits than its factorization.

210100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 210100023 is about 14494.8274567171. The cubic root of 210100023 is about 594.4865499651.

Adding to 210100023 its reverse (320001012), we get a palindrome (530101035).

The spelling of 210100023 in words is "two hundred ten million, one hundred thousand, twenty-three".