212144542 has 8 divisors (see below), whose sum is σ = 325617336. Its totient is φ = 103605432.

The previous prime is 212144509. The next prime is 212144549. The reversal of 212144542 is 245441212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212144549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233313 + ... + 1233484.

It is an arithmetic number, because the mean of its divisors is an integer number (40702167).

Almost surely, 2^212144542 is an apocalyptic number.

212144542 is a deficient number, since it is larger than the sum of its proper divisors (113472794).

212144542 is a wasteful number, since it uses less digits than its factorization.

212144542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466842.

The product of its digits is 2560, while the sum is 25.

The square root of 212144542 is about 14565.1825254612. The cubic root of 212144542 is about 596.4086783849.

Adding to 212144542 its reverse (245441212), we get a palindrome (457585754).

The spelling of 212144542 in words is "two hundred twelve million, one hundred forty-four thousand, five hundred forty-two".