1031345140 has 72 divisors (see below), whose sum is σ = 2524731552. Its totient is φ = 352860480.

The previous prime is 1031345123. The next prime is 1031345149. The reversal of 1031345140 is 415431301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031345149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 676419 + ... + 677941.

It is an arithmetic number, because the mean of its divisors is an integer number (35065716).

Almost surely, 2^1031345140 is an apocalyptic number.

1031345140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031345140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262365776).

1031345140 is an abundant number, since it is smaller than the sum of its proper divisors (1493386412).

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

1031345140 is a wasteful number, since it uses less digits than its factorization.

1031345140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1031345140 is about 32114.5627402896. The cubic root of 1031345140 is about 1010.3410735800.

Adding to 1031345140 its reverse (415431301), we get a palindrome (1446776441).

The spelling of 1031345140 in words is "one billion, thirty-one million, three hundred forty-five thousand, one hundred forty".