400013055 has 24 divisors (see below), whose sum is σ = 746692128. Its totient is φ = 196929216.

The previous prime is 400013041. The next prime is 400013069. The reversal of 400013055 is 550310004.

It is an interprime number because it is at equal distance from previous prime (400013041) and next prime (400013069).

It is not a de Polignac number, because 400013055 - 2²⁰ = 398964479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341307 + ... + 342476.

It is an arithmetic number, because the mean of its divisors is an integer number (31112172).

Almost surely, 2^400013055 is an apocalyptic number.

400013055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400013055 is a deficient number, since it is larger than the sum of its proper divisors (346679073).

400013055 is a wasteful number, since it uses less digits than its factorization.

400013055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683807 (or 683804 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 400013055 is about 20000.3263723370. The cubic root of 400013055 is about 736.8143154794.

Adding to 400013055 its reverse (550310004), we get a palindrome (950323059).

The spelling of 400013055 in words is "four hundred million, thirteen thousand, fifty-five".