401221224 has 24 divisors (see below), whose sum is σ = 1086641010. Its totient is φ = 133740384.

The previous prime is 401221207. The next prime is 401221231. The reversal of 401221224 is 422122104.

It can be written as a sum of positive squares in only one way, i.e., 392753124 + 8468100 = 19818^2 + 2910^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 401221197 and 401221206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2786187 + ... + 2786330.

Almost surely, 2^401221224 is an apocalyptic number.

It is an amenable number.

401221224 is an abundant number, since it is smaller than the sum of its proper divisors (685419786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401221224 is a wasteful number, since it uses less digits than its factorization.

401221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5572529 (or 5572522 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 401221224 is about 20030.5073325665. The cubic root of 401221224 is about 737.5553758668. Note that the first 3 decimals are identical.

Adding to 401221224 its reverse (422122104), we get a palindrome (823343328).

The spelling of 401221224 in words is "four hundred one million, two hundred twenty-one thousand, two hundred twenty-four".