243115151440 has 160 divisors (see below), whose sum is σ = 683096279040. Its totient is φ = 78697267200.

The previous prime is 243115151423. The next prime is 243115151443. The reversal of 243115151440 is 44151511342.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115151443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 540976 + ... + 882544.

It is an arithmetic number, because the mean of its divisors is an integer number (4269351744).

Almost surely, 2^243115151440 is an apocalyptic number.

243115151440 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 243115151440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341548139520).

243115151440 is an abundant number, since it is smaller than the sum of its proper divisors (439981127600).

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

243115151440 is a wasteful number, since it uses less digits than its factorization.

243115151440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341661 (or 341655 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 243115151440 its reverse (44151511342), we get a palindrome (287266662782).

The spelling of 243115151440 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred fifty-one thousand, four hundred forty".