243155315120 has 40 divisors (see below), whose sum is σ = 565626238080. Its totient is φ = 97212211200.

The previous prime is 243155315113. The next prime is 243155315171. The reversal of 243155315120 is 21513551342.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×243155315120² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622865 + ... + 935024.

It is an arithmetic number, because the mean of its divisors is an integer number (14140655952).

Almost surely, 2^243155315120 is an apocalyptic number.

243155315120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243155315120 is an abundant number, since it is smaller than the sum of its proper divisors (322470922960).

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

243155315120 is a wasteful number, since it uses less digits than its factorization.

243155315120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559853 (or 1559847 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 243155315120 its reverse (21513551342), we get a palindrome (264668866462).

The spelling of 243155315120 in words is "two hundred forty-three billion, one hundred fifty-five million, three hundred fifteen thousand, one hundred twenty".