212631105 has 8 divisors (see below), whose sum is σ = 340209792. Its totient is φ = 113403248.

The previous prime is 212631101. The next prime is 212631131. The reversal of 212631105 is 501136212.

212631105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212631105 - 2² = 212631101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212631101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7087689 + ... + 7087718.

It is an arithmetic number, because the mean of its divisors is an integer number (42526224).

Almost surely, 2^212631105 is an apocalyptic number.

It is an amenable number.

212631105 is a deficient number, since it is larger than the sum of its proper divisors (127578687).

212631105 is a wasteful number, since it uses less digits than its factorization.

212631105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14175415.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 212631105 is about 14581.8759081265. The cubic root of 212631105 is about 596.8642935682.

Adding to 212631105 its reverse (501136212), we get a palindrome (713767317).

The spelling of 212631105 in words is "two hundred twelve million, six hundred thirty-one thousand, one hundred five".