400205055 has 8 divisors (see below), whose sum is σ = 640328112. Its totient is φ = 213442688.

The previous prime is 400205027. The next prime is 400205077. The reversal of 400205055 is 550502004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400205055 - 2⁵ = 400205023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13340154 + ... + 13340183.

It is an arithmetic number, because the mean of its divisors is an integer number (80041014).

Almost surely, 2^400205055 is an apocalyptic number.

400205055 is a deficient number, since it is larger than the sum of its proper divisors (240123057).

400205055 is a wasteful number, since it uses less digits than its factorization.

400205055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26680345.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 400205055 is about 20005.1257181753. The cubic root of 400205055 is about 736.9321830662.

Adding to 400205055 its reverse (550502004), we get a palindrome (950707059).

The spelling of 400205055 in words is "four hundred million, two hundred five thousand, fifty-five".