400423225 has 6 divisors (see below), whose sum is σ = 496524830. Its totient is φ = 320338560.

The previous prime is 400423171. The next prime is 400423241. The reversal of 400423225 is 522324004.

It can be written as a sum of positive squares in 3 ways, for example, as 5089536 + 395333689 = 2256^2 + 19883^2 .

It is not a de Polignac number, because 400423225 - 2⁹ = 400422713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400423196 and 400423205.

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, 8008440 + ... + 8008489.

Almost surely, 2^400423225 is an apocalyptic number.

It is an amenable number.

400423225 is a deficient number, since it is larger than the sum of its proper divisors (96101605).

400423225 is a wasteful number, since it uses less digits than its factorization.

400423225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16016939 (or 16016934 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 400423225 is about 20010.5778277390. The cubic root of 400423225 is about 737.0660705035.

Adding to 400423225 its reverse (522324004), we get a palindrome (922747229).

The spelling of 400423225 in words is "four hundred million, four hundred twenty-three thousand, two hundred twenty-five".