1031223040 has 72 divisors (see below), whose sum is σ = 2487139200. Its totient is φ = 409645056.

The previous prime is 1031223023. The next prime is 1031223049. The reversal of 1031223040 is 403221301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031223049) 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, 188017 + ... + 193423.

It is an arithmetic number, because the mean of its divisors is an integer number (34543600).

Almost surely, 2^1031223040 is an apocalyptic number.

1031223040 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 1031223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1243569600).

1031223040 is an abundant number, since it is smaller than the sum of its proper divisors (1455916160).

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

1031223040 is an equidigital number, since it uses as much as digits as its factorization.

1031223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577 (or 5563 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1031223040 is about 32112.6616772886. The cubic root of 1031223040 is about 1010.3012008905.

Adding to 1031223040 its reverse (403221301), we get a palindrome (1434444341).

The spelling of 1031223040 in words is "one billion, thirty-one million, two hundred twenty-three thousand, forty".