100400243243 has 8 divisors (see below), whose sum is σ = 101828314080. Its totient is φ = 98972560960.

The previous prime is 100400243239. The next prime is 100400243263. The reversal of 100400243243 is 342342004001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100400243243 - 2² = 100400243239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100400243233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444653 + ... + 631281.

It is an arithmetic number, because the mean of its divisors is an integer number (12728539260).

Almost surely, 2^100400243243 is an apocalyptic number.

100400243243 is a deficient number, since it is larger than the sum of its proper divisors (1428070837).

100400243243 is an equidigital number, since it uses as much as digits as its factorization.

100400243243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194277.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 100400243243 its reverse (342342004001), we get a palindrome (442742247244).

The spelling of 100400243243 in words is "one hundred billion, four hundred million, two hundred forty-three thousand, two hundred forty-three".