210442131 has 24 divisors (see below), whose sum is σ = 320420464. Its totient is φ = 137985120.

The previous prime is 210442123. The next prime is 210442139. The reversal of 210442131 is 131244012.

210442131 is a `hidden beast` number, since 210 + 4 + 421 + 31 = 666.

210442131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (210442123) and next prime (210442139).

It is not a de Polignac number, because 210442131 - 2³ = 210442123 is a prime.

It is a super-2 number, since 2×210442131² = 88571780999642322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210442139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7725 + ... + 21921.

Almost surely, 2^210442131 is an apocalyptic number.

210442131 is a deficient number, since it is larger than the sum of its proper divisors (109978333).

210442131 is an equidigital number, since it uses as much as digits as its factorization.

210442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14273 (or 14261 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 210442131 is about 14506.6236940234. The cubic root of 210442131 is about 594.8090444825.

Adding to 210442131 its reverse (131244012), we get a palindrome (341686143).

The spelling of 210442131 in words is "two hundred ten million, four hundred forty-two thousand, one hundred thirty-one".