243500142536 has 120 divisors (see below), whose sum is σ = 542984297730. Its totient is φ = 102365512704.

The previous prime is 243500142497. The next prime is 243500142541. The reversal of 243500142536 is 635241005342.

It can be written as a sum of positive squares in 3 ways, for example, as 177825829636 + 65674312900 = 421694^2 + 256270^2 .

It is a super-2 number, since 2×243500142536² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243500142496 and 243500142505.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 53953016 + ... + 53957528.

Almost surely, 2^243500142536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243500142536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271492148865).

243500142536 is an abundant number, since it is smaller than the sum of its proper divisors (299484155194).

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

243500142536 is an frugal number, since it uses more digits than its factorization.

243500142536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4653 (or 4575 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 243500142536 its reverse (635241005342), we get a palindrome (878741147878).

The spelling of 243500142536 in words is "two hundred forty-three billion, five hundred million, one hundred forty-two thousand, five hundred thirty-six".