212133573 has 10 divisors (see below), whose sum is σ = 316891014. Its totient is φ = 141422328.

The previous prime is 212133569. The next prime is 212133583. The reversal of 212133573 is 375331212.

212133573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 118004769 + 94128804 = 10863^2 + 9702^2 .

It is not a de Polignac number, because 212133573 - 2² = 212133569 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212133503) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1309386 + ... + 1309547.

Almost surely, 2^212133573 is an apocalyptic number.

It is an amenable number.

212133573 is a deficient number, since it is larger than the sum of its proper divisors (104757441).

212133573 is an equidigital number, since it uses as much as digits as its factorization.

212133573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618945 (or 2618936 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 212133573 is about 14564.8059719311. The cubic root of 212133573 is about 596.3983990419.

Adding to 212133573 its reverse (375331212), we get a palindrome (587464785).

The spelling of 212133573 in words is "two hundred twelve million, one hundred thirty-three thousand, five hundred seventy-three".