1031223420 has 192 divisors, whose sum is σ = 3326400000. Its totient is φ = 265047552.

The previous prime is 1031223407. The next prime is 1031223437. The reversal of 1031223420 is 243221301.

1031223420 is a `hidden beast` number, since 10 + 312 + 2 + 342 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1031223393 and 1031223402.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 2066331 + ... + 2066829.

It is an arithmetic number, because the mean of its divisors is an integer number (17325000).

Almost surely, 2^1031223420 is an apocalyptic number.

1031223420 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 1031223420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663200000).

1031223420 is an abundant number, since it is smaller than the sum of its proper divisors (2295176580).

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

1031223420 is a wasteful number, since it uses less digits than its factorization.

1031223420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1031223420 is about 32112.6675939574. The cubic root of 1031223420 is about 1010.3013249873.

Adding to 1031223420 its reverse (243221301), we get a palindrome (1274444721).

The spelling of 1031223420 in words is "one billion, thirty-one million, two hundred twenty-three thousand, four hundred twenty".