400565055 has 48 divisors (see below), whose sum is σ = 713220480. Its totient is φ = 191801280.

The previous prime is 400565051. The next prime is 400565063. The reversal of 400565055 is 550565004.

It is not a de Polignac number, because 400565055 - 2² = 400565051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400565051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149316 + ... + 151974.

It is an arithmetic number, because the mean of its divisors is an integer number (14858760).

Almost surely, 2^400565055 is an apocalyptic number.

400565055 is a deficient number, since it is larger than the sum of its proper divisors (312655425).

400565055 is a wasteful number, since it uses less digits than its factorization.

400565055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 400565055 is about 20014.1213896589. The cubic root of 400565055 is about 737.1530832226.

The spelling of 400565055 in words is "four hundred million, five hundred sixty-five thousand, fifty-five".