212733243 has 16 divisors (see below), whose sum is σ = 315552640. Its totient is φ = 141645672.

The previous prime is 212733203. The next prime is 212733251. The reversal of 212733243 is 342337212.

It is a de Polignac number, because none of the positive numbers 2^k-212733243 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212733203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19380 + ... + 28302.

It is an arithmetic number, because the mean of its divisors is an integer number (19722040).

Almost surely, 2^212733243 is an apocalyptic number.

212733243 is a deficient number, since it is larger than the sum of its proper divisors (102819397).

212733243 is an equidigital number, since it uses as much as digits as its factorization.

212733243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9815 (or 9809 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 212733243 is about 14585.3777119415. The cubic root of 212733243 is about 596.9598467982.

The spelling of 212733243 in words is "two hundred twelve million, seven hundred thirty-three thousand, two hundred forty-three".