211631113 has 8 divisors (see below), whose sum is σ = 226257408. Its totient is φ = 197246784.

The previous prime is 211631111. The next prime is 211631117. The reversal of 211631113 is 311136112.

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

It is not a de Polignac number, because 211631113 - 2¹ = 211631111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211631111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58681 + ... + 62182.

It is an arithmetic number, because the mean of its divisors is an integer number (28282176).

Almost surely, 2^211631113 is an apocalyptic number.

It is an amenable number.

211631113 is a deficient number, since it is larger than the sum of its proper divisors (14626295).

211631113 is a wasteful number, since it uses less digits than its factorization.

211631113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120983.

The product of its digits is 108, while the sum is 19.

The square root of 211631113 is about 14547.5466316489. The cubic root of 211631113 is about 595.9271499700.

Adding to 211631113 its reverse (311136112), we get a palindrome (522767225).

The spelling of 211631113 in words is "two hundred eleven million, six hundred thirty-one thousand, one hundred thirteen".