212316631 has 8 divisors (see below), whose sum is σ = 217207760. Its totient is φ = 207479232.

The previous prime is 212316623. The next prime is 212316647. The reversal of 212316631 is 136613212.

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 212316631 - 2³ = 212316623 is a prime.

It is a super-2 number, since 2×212316631² = 90156703598380322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212316596 and 212316605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212316031) 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, 5385 + ... + 21298.

It is an arithmetic number, because the mean of its divisors is an integer number (27150970).

Almost surely, 2^212316631 is an apocalyptic number.

212316631 is a deficient number, since it is larger than the sum of its proper divisors (4891129).

212316631 is a wasteful number, since it uses less digits than its factorization.

212316631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26865.

The product of its digits is 1296, while the sum is 25.

The square root of 212316631 is about 14571.0888748920. The cubic root of 212316631 is about 596.5699012198.

Adding to 212316631 its reverse (136613212), we get a palindrome (348929843).

The spelling of 212316631 in words is "two hundred twelve million, three hundred sixteen thousand, six hundred thirty-one".