243155042040 has 32 divisors (see below), whose sum is σ = 729465126480. Its totient is φ = 64841344512.

The previous prime is 243155041973. The next prime is 243155042047. The reversal of 243155042040 is 40240551342.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 243155041989 and 243155042007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243155042047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013145889 + ... + 1013146128.

Almost surely, 2^243155042040 is an apocalyptic number.

243155042040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243155042040 is an abundant number, since it is smaller than the sum of its proper divisors (486310084440).

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

243155042040 is a wasteful number, since it uses less digits than its factorization.

243155042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026292031 (or 2026292027 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 243155042040 its reverse (40240551342), we get a palindrome (283395593382).

The spelling of 243155042040 in words is "two hundred forty-three billion, one hundred fifty-five million, forty-two thousand, forty".