400222111 has 4 divisors (see below), whose sum is σ = 401985432. Its totient is φ = 398458792.

The previous prime is 400222093. The next prime is 400222117. The reversal of 400222111 is 111222004.

It is a happy number.

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 400222111 - 2⁵ = 400222079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400222091 and 400222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400222117) 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, 881320 + ... + 881773.

It is an arithmetic number, because the mean of its divisors is an integer number (100496358).

Almost surely, 2^400222111 is an apocalyptic number.

400222111 is a deficient number, since it is larger than the sum of its proper divisors (1763321).

400222111 is a wasteful number, since it uses less digits than its factorization.

400222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763320.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 400222111 is about 20005.5520043812. The cubic root of 400222111 is about 736.9426518135.

Adding to 400222111 its reverse (111222004), we get a palindrome (511444115).

The spelling of 400222111 in words is "four hundred million, two hundred twenty-two thousand, one hundred eleven".