400232215 has 4 divisors (see below), whose sum is σ = 480278664. Its totient is φ = 320185768.

The previous prime is 400232179. The next prime is 400232221. The reversal of 400232215 is 512232004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400232215 - 2²⁵ = 366677783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400232192 and 400232201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40023217 + ... + 40023226.

It is an arithmetic number, because the mean of its divisors is an integer number (120069666).

Almost surely, 2^400232215 is an apocalyptic number.

400232215 is a deficient number, since it is larger than the sum of its proper divisors (80046449).

400232215 is an equidigital number, since it uses as much as digits as its factorization.

400232215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80046448.

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

The square root of 400232215 is about 20005.8045326850. The cubic root of 400232215 is about 736.9488533748.

Adding to 400232215 its reverse (512232004), we get a palindrome (912464219).

The spelling of 400232215 in words is "four hundred million, two hundred thirty-two thousand, two hundred fifteen".