551221712 has 20 divisors (see below), whose sum is σ = 1094041956. Its totient is φ = 268888320.

The previous prime is 551221691. The next prime is 551221721. The reversal of 551221712 is 217122155.

551221712 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 2 ways, for example, as 48385936 + 502835776 = 6956^2 + 22424^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419483 + ... + 420794.

Almost surely, 2^551221712 is an apocalyptic number.

It is an amenable number.

551221712 is a deficient number, since it is larger than the sum of its proper divisors (542820244).

551221712 is a wasteful number, since it uses less digits than its factorization.

551221712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840326 (or 840320 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 551221712 is about 23478.1113380101. Note that the first 3 decimals coincide. The cubic root of 551221712 is about 819.9274732602.

Adding to 551221712 its reverse (217122155), we get a palindrome (768343867).

The spelling of 551221712 in words is "five hundred fifty-one million, two hundred twenty-one thousand, seven hundred twelve".