212631205 has 16 divisors (see below), whose sum is σ = 268709760. Its totient is φ = 161206848.

The previous prime is 212631203. The next prime is 212631217. The reversal of 212631205 is 502136212.

It is a cyclic number.

It is not a de Polignac number, because 212631205 - 2¹ = 212631203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212631203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4054 + ... + 21016.

It is an arithmetic number, because the mean of its divisors is an integer number (16794360).

Almost surely, 2^212631205 is an apocalyptic number.

It is an amenable number.

212631205 is a deficient number, since it is larger than the sum of its proper divisors (56078555).

212631205 is a wasteful number, since it uses less digits than its factorization.

212631205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17100.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 212631205 is about 14581.8793370402. The cubic root of 212631205 is about 596.8643871362.

Adding to 212631205 its reverse (502136212), we get a palindrome (714767417).

The spelling of 212631205 in words is "two hundred twelve million, six hundred thirty-one thousand, two hundred five".