1232513343440 has 20 divisors (see below), whose sum is σ = 2865593523684. Its totient is φ = 493005337344.

The previous prime is 1232513343431. The next prime is 1232513343449. The reversal of 1232513343440 is 443433152321.

It is an interprime number because it is at equal distance from previous prime (1232513343431) and next prime (1232513343449).

It can be written as a sum of positive squares in 2 ways, for example, as 459499602496 + 773013740944 = 677864^2 + 879212^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1232513343440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232513343449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7703208317 + ... + 7703208476.

Almost surely, 2^{1232513343440} is an apocalyptic number.

1232513343440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1232513343440 is an abundant number, since it is smaller than the sum of its proper divisors (1633080180244).

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

1232513343440 is a wasteful number, since it uses less digits than its factorization.

1232513343440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15406416806 (or 15406416800 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 1232513343440 its reverse (443433152321), we get a palindrome (1675946495761).

The spelling of 1232513343440 in words is "one trillion, two hundred thirty-two billion, five hundred thirteen million, three hundred forty-three thousand, four hundred forty".