100213823 has 4 divisors (see below), whose sum is σ = 102346080. Its totient is φ = 98081568.

The previous prime is 100213819. The next prime is 100213849. The reversal of 100213823 is 328312001.

100213823 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100213823 - 2² = 100213819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100213795 and 100213804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100213123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066058 + ... + 1066151.

It is an arithmetic number, because the mean of its divisors is an integer number (25586520).

Almost surely, 2^100213823 is an apocalyptic number.

100213823 is a deficient number, since it is larger than the sum of its proper divisors (2132257).

100213823 is an equidigital number, since it uses as much as digits as its factorization.

100213823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132256.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 100213823 is about 10010.6854410675. The cubic root of 100213823 is about 464.4894739966.

Adding to 100213823 its reverse (328312001), we get a palindrome (428525824).

The spelling of 100213823 in words is "one hundred million, two hundred thirteen thousand, eight hundred twenty-three".