401783221 has 8 divisors (see below), whose sum is σ = 461747520. Its totient is φ = 342460608.

The previous prime is 401783209. The next prime is 401783227. The reversal of 401783221 is 122387104.

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

It is a de Polignac number, because none of the positive numbers 2^k-401783221 is a prime.

It is a super-2 number, since 2×401783221² = 322859513354269682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401783221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401783227) 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, 159076 + ... + 161581.

It is an arithmetic number, because the mean of its divisors is an integer number (57718440).

Almost surely, 2^401783221 is an apocalyptic number.

It is an amenable number.

401783221 is a deficient number, since it is larger than the sum of its proper divisors (59964299).

401783221 is a wasteful number, since it uses less digits than its factorization.

401783221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320843.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 401783221 is about 20044.5309498626. The cubic root of 401783221 is about 737.8995837503.

The spelling of 401783221 in words is "four hundred one million, seven hundred eighty-three thousand, two hundred twenty-one".