400220599 has 2 divisors, whose sum is σ = 400220600. Its totient is φ = 400220598.

The previous prime is 400220593. The next prime is 400220603. The reversal of 400220599 is 995022004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400220599 - 2³ = 400220591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400220599.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400220591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200110299 + 200110300.

It is an arithmetic number, because the mean of its divisors is an integer number (200110300).

Almost surely, 2^400220599 is an apocalyptic number.

400220599 is a deficient number, since it is larger than the sum of its proper divisors (1).

400220599 is an equidigital number, since it uses as much as digits as its factorization.

400220599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 400220599 is about 20005.5142148359. The cubic root of 400220599 is about 736.9417237799.

The spelling of 400220599 in words is "four hundred million, two hundred twenty thousand, five hundred ninety-nine".