1031220140 has 48 divisors (see below), whose sum is σ = 2188039392. Its totient is φ = 408231936.

The previous prime is 1031220139. The next prime is 1031220143. The reversal of 1031220140 is 410221301.

It is not an unprimeable number, because it can be changed into a prime (1031220143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 893804 + ... + 894956.

It is an arithmetic number, because the mean of its divisors is an integer number (45584154).

Almost surely, 2^1031220140 is an apocalyptic number.

1031220140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031220140 is an abundant number, since it is smaller than the sum of its proper divisors (1156819252).

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

1031220140 is a wasteful number, since it uses less digits than its factorization.

1031220140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1031220140 is about 32112.6165237279. The cubic root of 1031220140 is about 1010.3002538350.

Adding to 1031220140 its reverse (410221301), we get a palindrome (1441441441).

The spelling of 1031220140 in words is "one billion, thirty-one million, two hundred twenty thousand, one hundred forty".