400241215205 has 8 divisors (see below), whose sum is σ = 517234801272. Its totient is φ = 295562743488.

The previous prime is 400241215201. The next prime is 400241215243. The reversal of 400241215205 is 502512142004.

It can be written as a sum of positive squares in 4 ways, for example, as 3867720481 + 396373494724 = 62191^2 + 629582^2 .

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 400241215205 - 2² = 400241215201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400241215201) by changing a digit.

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, 3078778514 + ... + 3078778643.

It is an arithmetic number, because the mean of its divisors is an integer number (64654350159).

Almost surely, 2^400241215205 is an apocalyptic number.

It is an amenable number.

400241215205 is a deficient number, since it is larger than the sum of its proper divisors (116993586067).

400241215205 is a wasteful number, since it uses less digits than its factorization.

400241215205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6157557175.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 400241215205 its reverse (502512142004), we get a palindrome (902753357209).

The spelling of 400241215205 in words is "four hundred billion, two hundred forty-one million, two hundred fifteen thousand, two hundred five".