212198656 has 18 divisors (see below), whose sum is σ = 423568922. Its totient is φ = 106099200.

The previous prime is 212198653. The next prime is 212198671. The reversal of 212198656 is 656891212.

It can be written as a sum of positive squares in only one way, i.e., 195552256 + 16646400 = 13984^2 + 4080^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212198653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414195 + ... + 414706.

Almost surely, 2^212198656 is an apocalyptic number.

It is an amenable number.

212198656 is a deficient number, since it is larger than the sum of its proper divisors (211370266).

212198656 is an frugal number, since it uses more digits than its factorization.

212198656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828917 (or 828903 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 212198656 is about 14567.0400562365. The cubic root of 212198656 is about 596.4593848751.

The spelling of 212198656 in words is "two hundred twelve million, one hundred ninety-eight thousand, six hundred fifty-six".