406555221403 has 2 divisors, whose sum is σ = 406555221404. Its totient is φ = 406555221402.

The previous prime is 406555221383. The next prime is 406555221433. The reversal of 406555221403 is 304122555604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406555221403 - 2²¹ = 406553124251 is a prime.

It is not a weakly prime, because it can be changed into another prime (406555221433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203277610701 + 203277610702.

It is an arithmetic number, because the mean of its divisors is an integer number (203277610702).

Almost surely, 2^406555221403 is an apocalyptic number.

406555221403 is a deficient number, since it is larger than the sum of its proper divisors (1).

406555221403 is an equidigital number, since it uses as much as digits as its factorization.

406555221403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 406555221403 in words is "four hundred six billion, five hundred fifty-five million, two hundred twenty-one thousand, four hundred three".