212144439 has 32 divisors (see below), whose sum is σ = 316237824. Its totient is φ = 125619840.

The previous prime is 212144437. The next prime is 212144461. The reversal of 212144439 is 934441212.

It is not a de Polignac number, because 212144439 - 2¹ = 212144437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212144437) 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 31 ways as a sum of consecutive naturals, for example, 274057 + ... + 274829.

It is an arithmetic number, because the mean of its divisors is an integer number (9882432).

Almost surely, 2^212144439 is an apocalyptic number.

212144439 is a deficient number, since it is larger than the sum of its proper divisors (104093385).

212144439 is a wasteful number, since it uses less digits than its factorization.

212144439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its digits is 6912, while the sum is 30.

The square root of 212144439 is about 14565.1789896314. The cubic root of 212144439 is about 596.4085818625.

The spelling of 212144439 in words is "two hundred twelve million, one hundred forty-four thousand, four hundred thirty-nine".