10311220 has 24 divisors (see below), whose sum is σ = 22353408. Its totient is φ = 3991200.

The previous prime is 10311193. The next prime is 10311221. The reversal of 10311220 is 2211301.

10311220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10311197 and 10311206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10311221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7696 + ... + 8935.

It is an arithmetic number, because the mean of its divisors is an integer number (931392).

Almost surely, 2^10311220 is an apocalyptic number.

10311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10311220 is an abundant number, since it is smaller than the sum of its proper divisors (12042188).

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

10311220 is a wasteful number, since it uses less digits than its factorization.

10311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16671 (or 16669 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 10311220 is about 3211.1088427520. The cubic root of 10311220 is about 217.6556863049.

Adding to 10311220 its reverse (2211301), we get a palindrome (12522521).

The spelling of 10311220 in words is "ten million, three hundred eleven thousand, two hundred twenty".