10731220 has 12 divisors (see below), whose sum is σ = 22535604. Its totient is φ = 4292480.

The previous prime is 10731211. The next prime is 10731241. The reversal of 10731220 is 2213701.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6739216 + 3992004 = 2596^2 + 1998^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10731194 and 10731203.

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, 268261 + ... + 268300.

It is an arithmetic number, because the mean of its divisors is an integer number (1877967).

Almost surely, 2^10731220 is an apocalyptic number.

10731220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10731220 is an abundant number, since it is smaller than the sum of its proper divisors (11804384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10731220 is a wasteful number, since it uses less digits than its factorization.

10731220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536570 (or 536568 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 10731220 is about 3275.8540871046. The cubic root of 10731220 is about 220.5716538089.

Adding to 10731220 its reverse (2213701), we get a palindrome (12944921).

The spelling of 10731220 in words is "ten million, seven hundred thirty-one thousand, two hundred twenty".