212144550 has 24 divisors (see below), whose sum is σ = 526118856. Its totient is φ = 56571840.

The previous prime is 212144549. The next prime is 212144551. The reversal of 212144550 is 55441212.

It is an interprime number because it is at equal distance from previous prime (212144549) and next prime (212144551).

It is a self number, because there is not a number n which added to its sum of digits gives 212144550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212144551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 706999 + ... + 707298.

It is an arithmetic number, because the mean of its divisors is an integer number (21921619).

Almost surely, 2^212144550 is an apocalyptic number.

212144550 is an abundant number, since it is smaller than the sum of its proper divisors (313974306).

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

212144550 is a wasteful number, since it uses less digits than its factorization.

212144550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414312 (or 1414307 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 212144550 is about 14565.1828000887. The cubic root of 212144550 is about 596.4086858818.

Adding to 212144550 its reverse (55441212), we get a palindrome (267585762).

The spelling of 212144550 in words is "two hundred twelve million, one hundred forty-four thousand, five hundred fifty".