212856042 has 32 divisors (see below), whose sum is σ = 499681152. Its totient is φ = 59171904.

The previous prime is 212856037. The next prime is 212856043. The reversal of 212856042 is 240658212.

It is not an unprimeable number, because it can be changed into a prime (212856043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66933 + ... + 70040.

It is an arithmetic number, because the mean of its divisors is an integer number (15615036).

Almost surely, 2^212856042 is an apocalyptic number.

212856042 is an abundant number, since it is smaller than the sum of its proper divisors (286825110).

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

212856042 is a wasteful number, since it uses less digits than its factorization.

212856042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137022.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 212856042 is about 14589.5867659094. The cubic root of 212856042 is about 597.0746885448.

The spelling of 212856042 in words is "two hundred twelve million, eight hundred fifty-six thousand, forty-two".