40242442221 has 32 divisors (see below), whose sum is σ = 61143344640. Its totient is φ = 26143603200.

The previous prime is 40242442217. The next prime is 40242442241. The reversal of 40242442221 is 12224424204.

It is not a de Polignac number, because 40242442221 - 2² = 40242442217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242442241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 954636 + ... + 995898.

It is an arithmetic number, because the mean of its divisors is an integer number (1910729520).

Almost surely, 2^40242442221 is an apocalyptic number.

40242442221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

40242442221 is a deficient number, since it is larger than the sum of its proper divisors (20900902419).

40242442221 is a wasteful number, since it uses less digits than its factorization.

40242442221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42194 (or 42188 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 40242442221 its reverse (12224424204), we get a palindrome (52466866425).

The spelling of 40242442221 in words is "forty billion, two hundred forty-two million, four hundred forty-two thousand, two hundred twenty-one".