1231322430 has 64 divisors (see below), whose sum is σ = 3220922880. Its totient is φ = 299435136.

The previous prime is 1231322419. The next prime is 1231322459. The reversal of 1231322430 is 342231321.

It is a super-2 number, since 2×1231322430² = 3032309853242209800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231322397 and 1231322406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13351 + ... + 51389.

It is an arithmetic number, because the mean of its divisors is an integer number (50326920).

Almost surely, 2^1231322430 is an apocalyptic number.

1231322430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231322430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610461440).

1231322430 is an abundant number, since it is smaller than the sum of its proper divisors (1989600450).

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

1231322430 is a wasteful number, since it uses less digits than its factorization.

1231322430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38145.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1231322430 is about 35090.2041886336. The cubic root of 1231322430 is about 1071.8251175465.

Adding to 1231322430 its reverse (342231321), we get a palindrome (1573553751).

It can be divided in two parts, 12313 and 22430, that added together give a palindrome (34743).

The spelling of 1231322430 in words is "one billion, two hundred thirty-one million, three hundred twenty-two thousand, four hundred thirty".