210442423 has 12 divisors (see below), whose sum is σ = 222747840. Its totient is φ = 198786816.

The previous prime is 210442411. The next prime is 210442447. The reversal of 210442423 is 324244012.

It is a happy number.

210442423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210442423 - 2²¹ = 208345271 is a prime.

It is a super-2 number, since 2×210442423² = 88572026796221858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210442394 and 210442403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210442483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172311 + ... + 173527.

It is an arithmetic number, because the mean of its divisors is an integer number (18562320).

Almost surely, 2^210442423 is an apocalyptic number.

210442423 is a deficient number, since it is larger than the sum of its proper divisors (12305417).

210442423 is a wasteful number, since it uses less digits than its factorization.

210442423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1715 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 210442423 is about 14506.6337583879. The cubic root of 210442423 is about 594.8093195924.

Adding to 210442423 its reverse (324244012), we get a palindrome (534686435).

The spelling of 210442423 in words is "two hundred ten million, four hundred forty-two thousand, four hundred twenty-three".