40220002421 has 4 divisors (see below), whose sum is σ = 40239276192. Its totient is φ = 40200728652.

The previous prime is 40220002393. The next prime is 40220002499. The reversal of 40220002421 is 12420002204.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40220002421 is a prime.

It is a super-2 number, since 2×40220002421² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40220002421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40220002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9633755 + ... + 9637928.

It is an arithmetic number, because the mean of its divisors is an integer number (10059819048).

Almost surely, 2^40220002421 is an apocalyptic number.

It is an amenable number.

40220002421 is a deficient number, since it is larger than the sum of its proper divisors (19273771).

40220002421 is a wasteful number, since it uses less digits than its factorization.

40220002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19273770.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 40220002421 its reverse (12420002204), we get a palindrome (52640004625).

The spelling of 40220002421 in words is "forty billion, two hundred twenty million, two thousand, four hundred twenty-one".