243120351400 has 24 divisors (see below), whose sum is σ = 565254817470. Its totient is φ = 97248140480.

The previous prime is 243120351379. The next prime is 243120351421. The reversal of 243120351400 is 4153021342.

It is an interprime number because it is at equal distance from previous prime (243120351379) and next prime (243120351421).

It can be written as a sum of positive squares in 3 ways, for example, as 172429240516 + 70691110884 = 415246^2 + 265878^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 607800679 + ... + 607801078.

Almost surely, 2^243120351400 is an apocalyptic number.

243120351400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243120351400 is an abundant number, since it is smaller than the sum of its proper divisors (322134466070).

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

243120351400 is a wasteful number, since it uses less digits than its factorization.

243120351400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215601773 (or 1215601764 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 243120351400 its reverse (4153021342), we get a palindrome (247273372742).

The spelling of 243120351400 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-one thousand, four hundred".