243201212440 has 32 divisors (see below), whose sum is σ = 554129352000. Its totient is φ = 96049085184.

The previous prime is 243201212399. The next prime is 243201212521. The reversal of 243201212440 is 44212102342.

It is a congruent number.

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, 38478045 + ... + 38484364.

It is an arithmetic number, because the mean of its divisors is an integer number (17316542250).

Almost surely, 2^243201212440 is an apocalyptic number.

243201212440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243201212440 is an abundant number, since it is smaller than the sum of its proper divisors (310928139560).

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

243201212440 is a wasteful number, since it uses less digits than its factorization.

243201212440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76962499 (or 76962495 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 243201212440 its reverse (44212102342), we get a palindrome (287413314782).

The spelling of 243201212440 in words is "two hundred forty-three billion, two hundred one million, two hundred twelve thousand, four hundred forty".