5551023435721 has 9 divisors (see below), whose sum is σ = 5560607903349. Its totient is φ = 5541455472000.

The previous prime is 5551023435707. The next prime is 5551023435731. The reversal of 5551023435721 is 1275343201555.

It is a happy number.

The square root of 5551023435721 is 2356061.

It is a perfect power (a square), and thus also a powerful number.

5551023435721 is digitally balanced in base 3, 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 4 ways, for example, as 2126525144121 + 3424498291600 = 1458261^2 + 1850540^2 .

It is not a de Polignac number, because 5551023435721 - 2¹⁹ = 5551022911433 is a prime.

It is a super-2 number, since 2×5551023435721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5551023435701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1651597081 + ... + 1651600441.

Almost surely, 2^{5551023435721} is an apocalyptic number.

5551023435721 is the 2356061-st square number.

5551023435721 is the 1178031-st centered octagonal number.

It is an amenable number.

5551023435721 is a deficient number, since it is larger than the sum of its proper divisors (9584467628).

5551023435721 is an frugal number, since it uses more digits than its factorization.

5551023435721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8124 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 5551023435721 in words is "five trillion, five hundred fifty-one billion, twenty-three million, four hundred thirty-five thousand, seven hundred twenty-one".