210131442 has 16 divisors (see below), whose sum is σ = 466958880. Its totient is φ = 70043796.

The previous prime is 210131417. The next prime is 210131459. The reversal of 210131442 is 244131012.

210131442 is a `hidden beast` number, since 210 + 13 + 1 + 442 = 666.

210131442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945608 + ... + 1945715.

It is an arithmetic number, because the mean of its divisors is an integer number (29184930).

Almost surely, 2^210131442 is an apocalyptic number.

210131442 is an abundant number, since it is smaller than the sum of its proper divisors (256827438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210131442 is a wasteful number, since it uses less digits than its factorization.

210131442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891334 (or 3891328 counting only the distinct ones).

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

The square root of 210131442 is about 14495.9112166155. The cubic root of 210131442 is about 594.5161822669.

Adding to 210131442 its reverse (244131012), we get a palindrome (454262454).

The spelling of 210131442 in words is "two hundred ten million, one hundred thirty-one thousand, four hundred forty-two".