31228683357169 has 9 divisors (see below), whose sum is σ = 31260988943947. Its totient is φ = 31196411138344.

The previous prime is 31228683357161. The next prime is 31228683357197. The reversal of 31228683357169 is 96175338682213.

It is a happy number.

The square root of 31228683357169 is 5588263.

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

It can be written as a sum of positive squares in only one way, i.e., 30823449260769 + 405234096400 = 5551887^2 + 636580^2 .

It is not a de Polignac number, because 31228683357169 - 2³ = 31228683357161 is a prime.

It is a super-2 number, since 2×31228683357169² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31228683357169.

It is not an unprimeable number, because it can be changed into a prime (31228683357161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6867972954 + ... + 6867977500.

Almost surely, 2^{31228683357169} is an apocalyptic number.

31228683357169 is the 5588263-rd square number.

31228683357169 is the 2794132-nd centered octagonal number.

It is an amenable number.

31228683357169 is a deficient number, since it is larger than the sum of its proper divisors (32305586778).

31228683357169 is an frugal number, since it uses more digits than its factorization.

31228683357169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552 (or 5776 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 64.

The spelling of 31228683357169 in words is "thirty-one trillion, two hundred twenty-eight billion, six hundred eighty-three million, three hundred fifty-seven thousand, one hundred sixty-nine".