212072656 has 20 divisors (see below), whose sum is σ = 416094400. Its totient is φ = 104693472.

The previous prime is 212072647. The next prime is 212072657. The reversal of 212072656 is 656270212.

212072656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212072656² = 89949622845788672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212072657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82626 + ... + 85153.

It is an arithmetic number, because the mean of its divisors is an integer number (20804720).

Almost surely, 2^212072656 is an apocalyptic number.

It is an amenable number.

212072656 is a deficient number, since it is larger than the sum of its proper divisors (204021744).

212072656 is a wasteful number, since it uses less digits than its factorization.

212072656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167866 (or 167860 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 212072656 is about 14562.7145821100. The cubic root of 212072656 is about 596.3413056440.

The spelling of 212072656 in words is "two hundred twelve million, seventy-two thousand, six hundred fifty-six".