243013500440 has 32 divisors (see below), whose sum is σ = 548561447280. Its totient is φ = 96888765312.

The previous prime is 243013500437. The next prime is 243013500449. The reversal of 243013500440 is 44005310342.

It is a super-2 number, since 2×243013500440² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243013500449) 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, 9882407 + ... + 9906966.

Almost surely, 2^243013500440 is an apocalyptic number.

243013500440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243013500440 is an abundant number, since it is smaller than the sum of its proper divisors (305547946840).

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

243013500440 is a wasteful number, since it uses less digits than its factorization.

243013500440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19789691 (or 19789687 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 243013500440 its reverse (44005310342), we get a palindrome (287018810782).

The spelling of 243013500440 in words is "two hundred forty-three billion, thirteen million, five hundred thousand, four hundred forty".