400255555 has 16 divisors (see below), whose sum is σ = 551289024. Its totient is φ = 273277440.

The previous prime is 400255553. The next prime is 400255579. The reversal of 400255555 is 555552004.

It is not a de Polignac number, because 400255555 - 2¹ = 400255553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400255553) 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 15 ways as a sum of consecutive naturals, for example, 16386 + ... + 32695.

It is an arithmetic number, because the mean of its divisors is an integer number (34455564).

Almost surely, 2^400255555 is an apocalyptic number.

400255555 is a deficient number, since it is larger than the sum of its proper divisors (151033469).

400255555 is a wasteful number, since it uses less digits than its factorization.

400255555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49326.

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 400255555 is about 20006.3878548827. The cubic root of 400255555 is about 736.9631784351.

The spelling of 400255555 in words is "four hundred million, two hundred fifty-five thousand, five hundred fifty-five".