400222255 has 4 divisors (see below), whose sum is σ = 480266712. Its totient is φ = 320177800.

The previous prime is 400222253. The next prime is 400222271. The reversal of 400222255 is 552222004.

It is a happy number.

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

It is not a de Polignac number, because 400222255 - 2¹ = 400222253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400222253) 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, 40022221 + ... + 40022230.

It is an arithmetic number, because the mean of its divisors is an integer number (120066678).

Almost surely, 2^400222255 is an apocalyptic number.

400222255 is a deficient number, since it is larger than the sum of its proper divisors (80044457).

400222255 is an equidigital number, since it uses as much as digits as its factorization.

400222255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80044456.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 400222255 is about 20005.5556033818. Note that the first 3 decimals coincide. The cubic root of 400222255 is about 736.9427401975.

Adding to 400222255 its reverse (552222004), we get a palindrome (952444259).

The spelling of 400222255 in words is "four hundred million, two hundred twenty-two thousand, two hundred fifty-five".