243121250052 has 72 divisors (see below), whose sum is σ = 631409816856. Its totient is φ = 78819692544.

The previous prime is 243121250033. The next prime is 243121250063. The reversal of 243121250052 is 250052121342.

243121250052 is a `hidden beast` number, since 243 + 121 + 250 + 0 + 52 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 94136057856 + 148985192196 = 306816^2 + 385986^2 .

It is a super-2 number, since 2×243121250052² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243121249998 and 243121250025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3553188 + ... + 3620964.

Almost surely, 2^243121250052 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 243121250052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315704908428).

243121250052 is an abundant number, since it is smaller than the sum of its proper divisors (388288566804).

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

243121250052 is a wasteful number, since it uses less digits than its factorization.

243121250052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70517 (or 70512 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 243121250052 its reverse (250052121342), we get a palindrome (493173371394).

The spelling of 243121250052 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred fifty thousand, fifty-two".