212193144 has 24 divisors (see below), whose sum is σ = 574689960. Its totient is φ = 70731024.

The previous prime is 212193097. The next prime is 212193151. The reversal of 212193144 is 441391212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1473492 + ... + 1473635.

It is an arithmetic number, because the mean of its divisors is an integer number (23945415).

Almost surely, 2^212193144 is an apocalyptic number.

212193144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212193144 is an abundant number, since it is smaller than the sum of its proper divisors (362496816).

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

212193144 is a wasteful number, since it uses less digits than its factorization.

212193144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947139 (or 2947132 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 212193144 is about 14566.8508607729. The cubic root of 212193144 is about 596.4542203552.

The spelling of 212193144 in words is "two hundred twelve million, one hundred ninety-three thousand, one hundred forty-four".