40181222 has 4 divisors (see below), whose sum is σ = 60271836. Its totient is φ = 20090610.

The previous prime is 40181191. The next prime is 40181233. The reversal of 40181222 is 22218104.

It is a happy number.

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

It is a super-2 number, since 2×40181222² = 3229061202826568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40181194 and 40181203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045304 + ... + 10045307.

It is an arithmetic number, because the mean of its divisors is an integer number (15067959).

Almost surely, 2^40181222 is an apocalyptic number.

40181222 is a deficient number, since it is larger than the sum of its proper divisors (20090614).

40181222 is a wasteful number, since it uses less digits than its factorization.

40181222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20090613.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 40181222 is about 6338.8659869096. The cubic root of 40181222 is about 342.5108867550.

Adding to 40181222 its reverse (22218104), we get a palindrome (62399326).

The spelling of 40181222 in words is "forty million, one hundred eighty-one thousand, two hundred twenty-two".