1020313220 has 24 divisors (see below), whose sum is σ = 2155495104. Its totient is φ = 405680096.

The previous prime is 1020313187. The next prime is 1020313223. The reversal of 1020313220 is 223130201.

It is a happy number.

1020313220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1020313195 and 1020313204.

It is not an unprimeable number, because it can be changed into a prime (1020313223) 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, 149402 + ... + 156081.

It is an arithmetic number, because the mean of its divisors is an integer number (89812296).

Almost surely, 2^1020313220 is an apocalyptic number.

1020313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020313220 is an abundant number, since it is smaller than the sum of its proper divisors (1135181884).

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

1020313220 is a wasteful number, since it uses less digits than its factorization.

1020313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305659 (or 305657 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1020313220 is about 31942.3421182605. The cubic root of 1020313220 is about 1006.7257363893.

Adding to 1020313220 its reverse (223130201), we get a palindrome (1243443421).

The spelling of 1020313220 in words is "one billion, twenty million, three hundred thirteen thousand, two hundred twenty".