400201224 has 16 divisors (see below), whose sum is σ = 1000503120. Its totient is φ = 133400400.

The previous prime is 400201223. The next prime is 400201229. The reversal of 400201224 is 422102004.

It is a super-2 number, since 2×400201224² = 320322039382196352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400201223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8337502 + ... + 8337549.

It is an arithmetic number, because the mean of its divisors is an integer number (62531445).

Almost surely, 2^400201224 is an apocalyptic number.

It is an amenable number.

400201224 is an abundant number, since it is smaller than the sum of its proper divisors (600301896).

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

400201224 is a wasteful number, since it uses less digits than its factorization.

400201224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16675060 (or 16675056 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 400201224 is about 20005.0299674857. The cubic root of 400201224 is about 736.9298316081.

Adding to 400201224 its reverse (422102004), we get a palindrome (822303228).

The spelling of 400201224 in words is "four hundred million, two hundred one thousand, two hundred twenty-four".