212566342 has 4 divisors (see below), whose sum is σ = 318849516. Its totient is φ = 106283170.

The previous prime is 212566337. The next prime is 212566373. The reversal of 212566342 is 243665212.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53141584 + ... + 53141587.

It is an arithmetic number, because the mean of its divisors is an integer number (79712379).

Almost surely, 2^212566342 is an apocalyptic number.

212566342 is a deficient number, since it is larger than the sum of its proper divisors (106283174).

212566342 is a wasteful number, since it uses less digits than its factorization.

212566342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106283173.

The product of its digits is 17280, while the sum is 31.

The square root of 212566342 is about 14579.6550713657. The cubic root of 212566342 is about 596.8036899430.

The spelling of 212566342 in words is "two hundred twelve million, five hundred sixty-six thousand, three hundred forty-two".