100400323031 has 4 divisors (see below), whose sum is σ = 100401316200. Its totient is φ = 100399329864.

The previous prime is 100400323027. The next prime is 100400323039. The reversal of 100400323031 is 130323004001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100400323031 - 2² = 100400323027 is a prime.

It is a super-2 number, since 2×100400323031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100400323039) 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, 325241 + ... + 553698.

It is an arithmetic number, because the mean of its divisors is an integer number (25100329050).

Almost surely, 2^100400323031 is an apocalyptic number.

100400323031 is a deficient number, since it is larger than the sum of its proper divisors (993169).

100400323031 is an equidigital number, since it uses as much as digits as its factorization.

100400323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993168.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 100400323031 its reverse (130323004001), we get a palindrome (230723327032).

The spelling of 100400323031 in words is "one hundred billion, four hundred million, three hundred twenty-three thousand, thirty-one".