40143222 has 64 divisors (see below), whose sum is σ = 107965440. Its totient is φ = 10793088.

The previous prime is 40143197. The next prime is 40143227. The reversal of 40143222 is 22234104.

40143222 is a `hidden beast` number, since 401 + 43 + 222 = 666.

It is a super-3 number, since 3×40143222³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40143195 and 40143204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3303 + ... + 9549.

It is an arithmetic number, because the mean of its divisors is an integer number (1686960).

Almost surely, 2^40143222 is an apocalyptic number.

40143222 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 40143222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53982720).

40143222 is an abundant number, since it is smaller than the sum of its proper divisors (67822218).

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

40143222 is a wasteful number, since it uses less digits than its factorization.

40143222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282 (or 6276 counting only the distinct ones).

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

The square root of 40143222 is about 6335.8678963501. The cubic root of 40143222 is about 342.4028800945.

Adding to 40143222 its reverse (22234104), we get a palindrome (62377326).

The spelling of 40143222 in words is "forty million, one hundred forty-three thousand, two hundred twenty-two".