212144643 has 32 divisors (see below), whose sum is σ = 327316800. Its totient is φ = 135675648.

The previous prime is 212144627. The next prime is 212144741. The reversal of 212144643 is 346441212.

It is a happy number.

212144643 is a `hidden beast` number, since 2 + 1 + 2 + 14 + 4 + 643 = 666.

It is not a de Polignac number, because 212144643 - 2⁴ = 212144627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (212144143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71473 + ... + 74381.

It is an arithmetic number, because the mean of its divisors is an integer number (10228650).

Almost surely, 2^212144643 is an apocalyptic number.

212144643 is a deficient number, since it is larger than the sum of its proper divisors (115172157).

212144643 is a wasteful number, since it uses less digits than its factorization.

212144643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3028 (or 3022 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 212144643 is about 14565.1859926333. The cubic root of 212144643 is about 596.4087730331.

Adding to 212144643 its reverse (346441212), we get a palindrome (558585855).

It can be divided in two parts, 2121 and 44643, that added together give a palindrome (46764).

The spelling of 212144643 in words is "two hundred twelve million, one hundred forty-four thousand, six hundred forty-three".