212368945 has 4 divisors (see below), whose sum is σ = 254842740. Its totient is φ = 169895152.

The previous prime is 212368939. The next prime is 212368957. The reversal of 212368945 is 549863212.

212368945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168584256 + 43784689 = 12984^2 + 6617^2 .

It is a cyclic number.

It is not a de Polignac number, because 212368945 - 2⁹ = 212368433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212368898 and 212368907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21236890 + ... + 21236899.

It is an arithmetic number, because the mean of its divisors is an integer number (63710685).

Almost surely, 2^212368945 is an apocalyptic number.

It is an amenable number.

212368945 is a deficient number, since it is larger than the sum of its proper divisors (42473795).

212368945 is an equidigital number, since it uses as much as digits as its factorization.

212368945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42473794.

The product of its digits is 103680, while the sum is 40.

The square root of 212368945 is about 14572.8838944116. The cubic root of 212368945 is about 596.6188947046.

The spelling of 212368945 in words is "two hundred twelve million, three hundred sixty-eight thousand, nine hundred forty-five".