211428313 has 4 divisors (see below), whose sum is σ = 212949520. Its totient is φ = 209907108.

The previous prime is 211428251. The next prime is 211428319. The reversal of 211428313 is 313824112.

It is a happy number.

211428313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211428313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211428319) 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, 760395 + ... + 760672.

It is an arithmetic number, because the mean of its divisors is an integer number (53237380).

Almost surely, 2^211428313 is an apocalyptic number.

It is an amenable number.

211428313 is a deficient number, since it is larger than the sum of its proper divisors (1521207).

211428313 is a wasteful number, since it uses less digits than its factorization.

211428313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521206.

The product of its digits is 1152, while the sum is 25.

The square root of 211428313 is about 14540.5747135387. The cubic root of 211428313 is about 595.7367358598.

The spelling of 211428313 in words is "two hundred eleven million, four hundred twenty-eight thousand, three hundred thirteen".