212250042 has 12 divisors (see below), whose sum is σ = 459875130. Its totient is φ = 70750008.

The previous prime is 212250041. The next prime is 212250091. The reversal of 212250042 is 240052212.

212250042 is a `hidden beast` number, since 2 + 122 + 500 + 42 = 666.

212250042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 154778481 + 57471561 = 12441^2 + 7581^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11791669 = 212250042 / (2 + 1 + 2 + 2 + 5 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 212249997 and 212250024.

It is not an unprimeable number, because it can be changed into a prime (212250041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5895817 + ... + 5895852.

Almost surely, 2^212250042 is an apocalyptic number.

212250042 is an abundant number, since it is smaller than the sum of its proper divisors (247625088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212250042 is a wasteful number, since it uses less digits than its factorization.

212250042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11791677 (or 11791674 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 212250042 is about 14568.8037257697. The cubic root of 212250042 is about 596.5075271660.

The spelling of 212250042 in words is "two hundred twelve million, two hundred fifty thousand, forty-two".