211213713 has 4 divisors (see below), whose sum is σ = 281618288. Its totient is φ = 140809140.

The previous prime is 211213703. The next prime is 211213727. The reversal of 211213713 is 317312112.

It is a happy number.

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 not a de Polignac number, because 211213713 - 2²² = 207019409 is a prime.

It is a super-2 number, since 2×211213713² = 89222465118492738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211213713.

It is not an unprimeable number, because it can be changed into a prime (211213703) 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, 35202283 + ... + 35202288.

It is an arithmetic number, because the mean of its divisors is an integer number (70404572).

Almost surely, 2^211213713 is an apocalyptic number.

It is an amenable number.

211213713 is a deficient number, since it is larger than the sum of its proper divisors (70404575).

211213713 is an equidigital number, since it uses as much as digits as its factorization.

211213713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70404574.

The product of its digits is 252, while the sum is 21.

The square root of 211213713 is about 14533.1934893884. The cubic root of 211213713 is about 595.5351097855.

Adding to 211213713 its reverse (317312112), we get a palindrome (528525825).

The spelling of 211213713 in words is "two hundred eleven million, two hundred thirteen thousand, seven hundred thirteen".