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401221224 = 23325572517
BaseRepresentation
bin10111111010100…
…010011001101000
31000221222011001100
4113322202121220
51310203034344
6103451321400
712641216115
oct2772423150
91027864040
10401221224
1119652a498
12b2450260
136517b411
143b40190c
1525355569
hex17ea2668

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, 2401221224 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".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 5572517 11145034 16717551 22290068 33435102 44580136 50152653 66870204 100305306 133740408 200610612 401221224