210742813 has 16 divisors (see below), whose sum is σ = 233694720. Its totient is φ = 189143856.

The previous prime is 210742801. The next prime is 210742817. The reversal of 210742813 is 318247012.

It is a cyclic number.

It is not a de Polignac number, because 210742813 - 2¹⁷ = 210611741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210742817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44506 + ... + 49012.

It is an arithmetic number, because the mean of its divisors is an integer number (14605920).

Almost surely, 2^210742813 is an apocalyptic number.

210742813 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

210742813 is a deficient number, since it is larger than the sum of its proper divisors (22951907).

210742813 is a wasteful number, since it uses less digits than its factorization.

210742813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 210742813 is about 14516.9836054189. The cubic root of 210742813 is about 595.0921995390.

Adding to 210742813 its reverse (318247012), we get a palindrome (528989825).

The spelling of 210742813 in words is "two hundred ten million, seven hundred forty-two thousand, eight hundred thirteen".