1331005220 has 48 divisors (see below), whose sum is σ = 2870719488. Its totient is φ = 518129280.

The previous prime is 1331005217. The next prime is 1331005223. The reversal of 1331005220 is 225001331.

It is an interprime number because it is at equal distance from previous prime (1331005217) and next prime (1331005223).

It is not an unprimeable number, because it can be changed into a prime (1331005223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166229 + ... + 174051.

It is an arithmetic number, because the mean of its divisors is an integer number (59806656).

Almost surely, 2^1331005220 is an apocalyptic number.

1331005220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331005220 is an abundant number, since it is smaller than the sum of its proper divisors (1539714268).

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

1331005220 is a wasteful number, since it uses less digits than its factorization.

1331005220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060 (or 8058 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1331005220 is about 36482.9442342583. The cubic root of 1331005220 is about 1100.0014380146.

Adding to 1331005220 its reverse (225001331), we get a palindrome (1556006551).

The spelling of 1331005220 in words is "one billion, three hundred thirty-one million, five thousand, two hundred twenty".