210042313 has 4 divisors (see below), whose sum is σ = 226199428. Its totient is φ = 193885200.

The previous prime is 210042281. The next prime is 210042341. The reversal of 210042313 is 313240012.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107060409 + 102981904 = 10347^2 + 10148^2 .

It is a cyclic number.

It is not a de Polignac number, because 210042313 - 2⁵ = 210042281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210042113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8078538 + ... + 8078563.

It is an arithmetic number, because the mean of its divisors is an integer number (56549857).

Almost surely, 2^210042313 is an apocalyptic number.

It is an amenable number.

210042313 is a deficient number, since it is larger than the sum of its proper divisors (16157115).

210042313 is a wasteful number, since it uses less digits than its factorization.

210042313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16157114.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 210042313 is about 14492.8366098566. The cubic root of 210042313 is about 594.4321140508.

Adding to 210042313 its reverse (313240012), we get a palindrome (523282325).

The spelling of 210042313 in words is "two hundred ten million, forty-two thousand, three hundred thirteen".