400224215 has 16 divisors (see below), whose sum is σ = 499387680. Its totient is φ = 307547520.

The previous prime is 400224193. The next prime is 400224221. The reversal of 400224215 is 512422004.

It is a happy number.

It is not a de Polignac number, because 400224215 - 2¹⁴ = 400207831 is a prime.

It is a super-3 number, since 3×400224215³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21560 + ... + 35570.

It is an arithmetic number, because the mean of its divisors is an integer number (31211730).

Almost surely, 2^400224215 is an apocalyptic number.

400224215 is a deficient number, since it is larger than the sum of its proper divisors (99163465).

400224215 is a wasteful number, since it uses less digits than its factorization.

400224215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 400224215 is about 20005.6045897144. The cubic root of 400224215 is about 736.9439432002.

Adding to 400224215 its reverse (512422004), we get a palindrome (912646219).

The spelling of 400224215 in words is "four hundred million, two hundred twenty-four thousand, two hundred fifteen".