2100040031 has 4 divisors (see below), whose sum is σ = 2100345912. Its totient is φ = 2099734152.

The previous prime is 2100040013. The next prime is 2100040057. The reversal of 2100040031 is 1300400012.

It is a happy number.

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 2100040031 - 2¹⁴ = 2100023647 is a prime.

It is a super-2 number, since 2×2100040031² = 8820336263604961922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100039994 and 2100040021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100040081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142400 + ... + 156453.

It is an arithmetic number, because the mean of its divisors is an integer number (525086478).

Almost surely, 2^2100040031 is an apocalyptic number.

2100040031 is a deficient number, since it is larger than the sum of its proper divisors (305881).

2100040031 is an equidigital number, since it uses as much as digits as its factorization.

2100040031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305880.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2100040031 is about 45826.1937214951. The cubic root of 2100040031 is about 1280.5873018984.

Adding to 2100040031 its reverse (1300400012), we get a palindrome (3400440043).

The spelling of 2100040031 in words is "two billion, one hundred million, forty thousand, thirty-one".