400222143 has 12 divisors (see below), whose sum is σ = 612104688. Its totient is φ = 251119680.

The previous prime is 400222139. The next prime is 400222153. The reversal of 400222143 is 341222004.

400222143 is a `hidden beast` number, since 400 + 2 + 221 + 43 = 666.

It is not a de Polignac number, because 400222143 - 2² = 400222139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400222153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1307763 + ... + 1308068.

It is an arithmetic number, because the mean of its divisors is an integer number (51008724).

Almost surely, 2^400222143 is an apocalyptic number.

400222143 is a deficient number, since it is larger than the sum of its proper divisors (211882545).

400222143 is a wasteful number, since it uses less digits than its factorization.

400222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615854 (or 2615851 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400222143 is about 20005.5528041591. The cubic root of 400222143 is about 736.9426714544.

Adding to 400222143 its reverse (341222004), we get a palindrome (741444147).

The spelling of 400222143 in words is "four hundred million, two hundred twenty-two thousand, one hundred forty-three".