10731321 has 6 divisors (see below), whose sum is σ = 15500810. Its totient is φ = 7154208.

The previous prime is 10731313. The next prime is 10731337. The reversal of 10731321 is 12313701.

10731321 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 only one way, i.e., 8785296 + 1946025 = 2964^2 + 1395^2 .

It is not a de Polignac number, because 10731321 - 2³ = 10731313 is a prime.

It is a super-2 number, since 2×10731321² = 230322500810082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10731294 and 10731303.

It is not an unprimeable number, because it can be changed into a prime (10731311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 596176 + ... + 596193.

Almost surely, 2^10731321 is an apocalyptic number.

It is an amenable number.

10731321 is a deficient number, since it is larger than the sum of its proper divisors (4769489).

10731321 is a wasteful number, since it uses less digits than its factorization.

10731321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192375 (or 1192372 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 10731321 is about 3275.8695028954. The cubic root of 10731321 is about 220.5723457982.

The spelling of 10731321 in words is "ten million, seven hundred thirty-one thousand, three hundred twenty-one".