212770013 has 8 divisors (see below), whose sum is σ = 223717080. Its totient is φ = 202063680.

The previous prime is 212770009. The next prime is 212770027. The reversal of 212770013 is 310077212.

It can be written as a sum of positive squares in 4 ways, for example, as 4169764 + 208600249 = 2042^2 + 14443^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212770013 - 2² = 212770009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212770003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58370 + ... + 61907.

It is an arithmetic number, because the mean of its divisors is an integer number (27964635).

Almost surely, 2^212770013 is an apocalyptic number.

It is an amenable number.

212770013 is a deficient number, since it is larger than the sum of its proper divisors (10947067).

212770013 is a wasteful number, since it uses less digits than its factorization.

212770013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120367.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 212770013 is about 14586.6381664865. The cubic root of 212770013 is about 596.9942387730.

The spelling of 212770013 in words is "two hundred twelve million, seven hundred seventy thousand, thirteen".