220612312 has 8 divisors (see below), whose sum is σ = 413648100. Its totient is φ = 110306152.

The previous prime is 220612291. The next prime is 220612361. The reversal of 220612312 is 213216022.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 220612312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13788262 + ... + 13788277.

Almost surely, 2^220612312 is an apocalyptic number.

It is an amenable number.

220612312 is a deficient number, since it is larger than the sum of its proper divisors (193035788).

220612312 is a wasteful number, since it uses less digits than its factorization.

220612312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27576545 (or 27576541 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 220612312 is about 14853.0236652340. The cubic root of 220612312 is about 604.2406172585.

Adding to 220612312 its reverse (213216022), we get a palindrome (433828334).

The spelling of 220612312 in words is "two hundred twenty million, six hundred twelve thousand, three hundred twelve".