212303618 has 6 divisors (see below), whose sum is σ = 318486339. Its totient is φ = 106141506.

The previous prime is 212303591. The next prime is 212303627. The reversal of 212303618 is 816303212.

It can be written as a sum of positive squares in only one way, i.e., 106151809 + 106151809 = 10303^2 + 10303^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10303.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15455 + ... + 25757.

Almost surely, 2^212303618 is an apocalyptic number.

212303618 is a deficient number, since it is larger than the sum of its proper divisors (106182721).

212303618 is an frugal number, since it uses more digits than its factorization.

212303618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20608 (or 10305 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 212303618 is about 14570.6423331300. The cubic root of 212303618 is about 596.5577129412.

The spelling of 212303618 in words is "two hundred twelve million, three hundred three thousand, six hundred eighteen".