400231225 has 6 divisors (see below), whose sum is σ = 496286750. Its totient is φ = 320184960.

The previous prime is 400231213. The next prime is 400231277. The reversal of 400231225 is 522132004.

It can be written as a sum of positive squares in 3 ways, for example, as 83960569 + 316270656 = 9163^2 + 17784^2 .

It is not a de Polignac number, because 400231225 - 2¹¹ = 400229177 is a prime.

It is a super-3 number, since 3×400231225³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8004600 + ... + 8004649.

Almost surely, 2^400231225 is an apocalyptic number.

It is an amenable number.

400231225 is a deficient number, since it is larger than the sum of its proper divisors (96055525).

400231225 is a wasteful number, since it uses less digits than its factorization.

400231225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16009259 (or 16009254 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400231225 is about 20005.7797898507. The cubic root of 400231225 is about 736.9482457442.

Adding to 400231225 its reverse (522132004), we get a palindrome (922363229).

The spelling of 400231225 in words is "four hundred million, two hundred thirty-one thousand, two hundred twenty-five".