400550165 has 8 divisors (see below), whose sum is σ = 480774528. Its totient is φ = 320363920.

The previous prime is 400550119. The next prime is 400550201. The reversal of 400550165 is 561055004.

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

It is not a de Polignac number, because 400550165 - 2²⁰ = 399501589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24920 + ... + 37710.

It is an arithmetic number, because the mean of its divisors is an integer number (60096816).

Almost surely, 2^400550165 is an apocalyptic number.

It is an amenable number.

400550165 is a deficient number, since it is larger than the sum of its proper divisors (80224363).

400550165 is a wasteful number, since it uses less digits than its factorization.

400550165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19059.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 400550165 is about 20013.7493988508. The cubic root of 400550165 is about 737.1439491712.

The spelling of 400550165 in words is "four hundred million, five hundred fifty thousand, one hundred sixty-five".