400216027 has 2 divisors, whose sum is σ = 400216028. Its totient is φ = 400216026.

The previous prime is 400216009. The next prime is 400216067. The reversal of 400216027 is 720612004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400216027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400215989 and 400216007.

It is not a weakly prime, because it can be changed into another prime (400216067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200108013 + 200108014.

It is an arithmetic number, because the mean of its divisors is an integer number (200108014).

Almost surely, 2^400216027 is an apocalyptic number.

400216027 is a deficient number, since it is larger than the sum of its proper divisors (1).

400216027 is an equidigital number, since it uses as much as digits as its factorization.

400216027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 400216027 is about 20005.3999460146. The cubic root of 400216027 is about 736.9389175688.

The spelling of 400216027 in words is "four hundred million, two hundred sixteen thousand, twenty-seven".