243155451140 has 48 divisors (see below), whose sum is σ = 583636311552. Its totient is φ = 83358550656.

The previous prime is 243155451131. The next prime is 243155451179. The reversal of 243155451140 is 41154551342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 243155451140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1273397 + ... + 1451843.

It is an arithmetic number, because the mean of its divisors is an integer number (12159089824).

Almost surely, 2^243155451140 is an apocalyptic number.

243155451140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243155451140 is an abundant number, since it is smaller than the sum of its proper divisors (340480860412).

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

243155451140 is a wasteful number, since it uses less digits than its factorization.

243155451140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188196 (or 188194 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 243155451140 in words is "two hundred forty-three billion, one hundred fifty-five million, four hundred fifty-one thousand, one hundred forty".