243103533440 has 64 divisors (see below), whose sum is σ = 586811964960. Its totient is φ = 96297295872.

The previous prime is 243103533391. The next prime is 243103533451. The reversal of 243103533440 is 44335301342.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 243103533397 and 243103533406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1778009 + ... + 1909848.

Almost surely, 2^243103533440 is an apocalyptic number.

243103533440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243103533440 is an abundant number, since it is smaller than the sum of its proper divisors (343708431520).

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

243103533440 is a wasteful number, since it uses less digits than its factorization.

243103533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687979 (or 3687967 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 243103533440 its reverse (44335301342), we get a palindrome (287438834782).

The spelling of 243103533440 in words is "two hundred forty-three billion, one hundred three million, five hundred thirty-three thousand, four hundred forty".