212303506 has 4 divisors (see below), whose sum is σ = 318455262. Its totient is φ = 106151752.

The previous prime is 212303489. The next prime is 212303543. The reversal of 212303506 is 605303212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 164070481 + 48233025 = 12809^2 + 6945^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53075875 + ... + 53075878.

Almost surely, 2^212303506 is an apocalyptic number.

212303506 is a deficient number, since it is larger than the sum of its proper divisors (106151756).

212303506 is a wasteful number, since it uses less digits than its factorization.

212303506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106151755.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 212303506 is about 14570.6384897849. The cubic root of 212303506 is about 596.5576080372.

Adding to 212303506 its reverse (605303212), we get a palindrome (817606718).

The spelling of 212303506 in words is "two hundred twelve million, three hundred three thousand, five hundred six".