212078651 has 16 divisors (see below), whose sum is σ = 220522368. Its totient is φ = 203860800.

The previous prime is 212078597. The next prime is 212078681. The reversal of 212078651 is 156870212.

It is a cyclic number.

It is not a de Polignac number, because 212078651 - 2¹⁰ = 212077627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212078681) 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 in 15 ways as a sum of consecutive naturals, for example, 640556 + ... + 640886.

It is an arithmetic number, because the mean of its divisors is an integer number (13782648).

Almost surely, 2^212078651 is an apocalyptic number.

212078651 is a deficient number, since it is larger than the sum of its proper divisors (8443717).

212078651 is a wasteful number, since it uses less digits than its factorization.

212078651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 212078651 is about 14562.9204145322. The cubic root of 212078651 is about 596.3469248384.

The spelling of 212078651 in words is "two hundred twelve million, seventy-eight thousand, six hundred fifty-one".