401222166 has 48 divisors (see below), whose sum is σ = 849514176. Its totient is φ = 126301648.

The previous prime is 401222161. The next prime is 401222177. The reversal of 401222166 is 661222104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401222161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262681 + ... + 264203.

It is an arithmetic number, because the mean of its divisors is an integer number (17698212).

Almost surely, 2^401222166 is an apocalyptic number.

401222166 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

401222166 is an abundant number, since it is smaller than the sum of its proper divisors (448292010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401222166 is a wasteful number, since it uses less digits than its factorization.

401222166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 401222166 is about 20030.5308466850. The cubic root of 401222166 is about 737.5559530851. Note that the first 3 decimals are identical.

The spelling of 401222166 in words is "four hundred one million, two hundred twenty-two thousand, one hundred sixty-six".