400220233 has 4 divisors (see below), whose sum is σ = 457394560. Its totient is φ = 343045908.

The previous prime is 400220209. The next prime is 400220281. The reversal of 400220233 is 332022004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400220233 - 2⁵ = 400220201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400220203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28587153 + ... + 28587166.

It is an arithmetic number, because the mean of its divisors is an integer number (114348640).

Almost surely, 2^400220233 is an apocalyptic number.

It is an amenable number.

400220233 is a deficient number, since it is larger than the sum of its proper divisors (57174327).

400220233 is an equidigital number, since it uses as much as digits as its factorization.

400220233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57174326.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400220233 is about 20005.5050673558. The cubic root of 400220233 is about 736.9414991365.

Adding to 400220233 its reverse (332022004), we get a palindrome (732242237).

The spelling of 400220233 in words is "four hundred million, two hundred twenty thousand, two hundred thirty-three".