31430680369 has 27 divisors (see below), whose sum is σ = 35196260953. Its totient is φ = 28046803400.

The previous prime is 31430680343. The next prime is 31430680381. The reversal of 31430680369 is 96308603413.

The square root of 31430680369 is 177287.

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

It is not a de Polignac number, because 31430680369 - 2¹³ = 31430672177 is a prime.

It is a super-2 number, since 2×31430680369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31430680399) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 138461034 + ... + 138461260.

Almost surely, 2^31430680369 is an apocalyptic number.

31430680369 is the 177287-th square number.

31430680369 is the 88644-th centered octagonal number.

It is an amenable number.

31430680369 is a deficient number, since it is larger than the sum of its proper divisors (3765580584).

31430680369 is an frugal number, since it uses more digits than its factorization.

31430680369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 31430680369 in words is "thirty-one billion, four hundred thirty million, six hundred eighty thousand, three hundred sixty-nine".