400043101 has 2 divisors, whose sum is σ = 400043102. Its totient is φ = 400043100.

The previous prime is 400043089. The next prime is 400043113. The reversal of 400043101 is 101340004.

It is a balanced prime because it is at equal distance from previous prime (400043089) and next prime (400043113).

It can be written as a sum of positive squares in only one way, i.e., 249956100 + 150087001 = 15810^2 + 12251^2 .

It is a cyclic number.

It is not a de Polignac number, because 400043101 - 2¹⁵ = 400010333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400043401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200021550 + 200021551.

It is an arithmetic number, because the mean of its divisors is an integer number (200021551).

Almost surely, 2^400043101 is an apocalyptic number.

It is an amenable number.

400043101 is a deficient number, since it is larger than the sum of its proper divisors (1).

400043101 is an equidigital number, since it uses as much as digits as its factorization.

400043101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400043101 is about 20001.0774959751. The cubic root of 400043101 is about 736.8327630179.

Adding to 400043101 its reverse (101340004), we get a palindrome (501383105).

The spelling of 400043101 in words is "four hundred million, forty-three thousand, one hundred one".