212720667 has 8 divisors (see below), whose sum is σ = 292776960. Its totient is φ = 137239080.

The previous prime is 212720663. The next prime is 212720687. The reversal of 212720667 is 766027212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212720667 - 2² = 212720663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212720663) 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, 1143567 + ... + 1143752.

It is an arithmetic number, because the mean of its divisors is an integer number (36597120).

Almost surely, 2^212720667 is an apocalyptic number.

212720667 is a deficient number, since it is larger than the sum of its proper divisors (80056293).

212720667 is a wasteful number, since it uses less digits than its factorization.

212720667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287353.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 212720667 is about 14584.9465888635. The cubic root of 212720667 is about 596.9480832160.

Adding to 212720667 its reverse (766027212), we get a palindrome (978747879).

The spelling of 212720667 in words is "two hundred twelve million, seven hundred twenty thousand, six hundred sixty-seven".