400313321 has 8 divisors (see below), whose sum is σ = 419596800. Its totient is φ = 381186432.

The previous prime is 400313317. The next prime is 400313351. The reversal of 400313321 is 123313004.

It is a happy number.

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 400313321 - 2² = 400313317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400313321.

It is not an unprimeable number, because it can be changed into a prime (400313351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33896 + ... + 44153.

It is an arithmetic number, because the mean of its divisors is an integer number (52449600).

Almost surely, 2^400313321 is an apocalyptic number.

It is an amenable number.

400313321 is a deficient number, since it is larger than the sum of its proper divisors (19283479).

400313321 is a wasteful number, since it uses less digits than its factorization.

400313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78295.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 400313321 is about 20007.8314916934. The cubic root of 400313321 is about 736.9986302580.

Adding to 400313321 its reverse (123313004), we get a palindrome (523626325).

The spelling of 400313321 in words is "four hundred million, three hundred thirteen thousand, three hundred twenty-one".