400032213 has 32 divisors (see below), whose sum is σ = 652569600. Its totient is φ = 212875776.

The previous prime is 400032209. The next prime is 400032229. The reversal of 400032213 is 312230004.

It is not a de Polignac number, because 400032213 - 2² = 400032209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400032192 and 400032201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15045 + ... + 32037.

It is an arithmetic number, because the mean of its divisors is an integer number (20392800).

Almost surely, 2^400032213 is an apocalyptic number.

It is an amenable number.

400032213 is a deficient number, since it is larger than the sum of its proper divisors (252537387).

400032213 is a wasteful number, since it uses less digits than its factorization.

400032213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17081.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400032213 is about 20000.8053087869. The cubic root of 400032213 is about 736.8260781483.

Adding to 400032213 its reverse (312230004), we get a palindrome (712262217).

The spelling of 400032213 in words is "four hundred million, thirty-two thousand, two hundred thirteen".