243400111040 has 56 divisors (see below), whose sum is σ = 610101609360. Its totient is φ = 92235829248.

The previous prime is 243400111039. The next prime is 243400111061. The reversal of 243400111040 is 40111004342.

It is a super-2 number, since 2×243400111040² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 20010377 + ... + 20022536.

Almost surely, 2^243400111040 is an apocalyptic number.

243400111040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243400111040 is an abundant number, since it is smaller than the sum of its proper divisors (366701498320).

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

243400111040 is a wasteful number, since it uses less digits than its factorization.

243400111040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40032949 (or 40032939 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 243400111040 its reverse (40111004342), we get a palindrome (283511115382).

The spelling of 243400111040 in words is "two hundred forty-three billion, four hundred million, one hundred eleven thousand, forty".