243232452540 has 288 divisors, whose sum is σ = 928007248896. Its totient is φ = 50094213120.

The previous prime is 243232452527. The next prime is 243232452587. The reversal of 243232452540 is 45254232342.

243232452540 is a `hidden beast` number, since 2 + 4 + 32 + 32 + 4 + 52 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 243232452495 and 243232452504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1488529 + ... + 1643831.

It is an arithmetic number, because the mean of its divisors is an integer number (3222247392).

Almost surely, 2^243232452540 is an apocalyptic number.

243232452540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243232452540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464003624448).

243232452540 is an abundant number, since it is smaller than the sum of its proper divisors (684774796356).

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

243232452540 is a wasteful number, since it uses less digits than its factorization.

243232452540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155449 (or 155444 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 36.

Adding to 243232452540 its reverse (45254232342), we get a palindrome (288486684882).

The spelling of 243232452540 in words is "two hundred forty-three billion, two hundred thirty-two million, four hundred fifty-two thousand, five hundred forty".