400003240432221 has 32 divisors (see below), whose sum is σ = 600747453307520. Its totient is φ = 263001692610432.

The previous prime is 400003240432207. The next prime is 400003240432253. The reversal of 400003240432221 is 122234042300004.

400003240432221 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 0 + 3 + 2 + 4 + 0 + 432 + 221 = 666.

It is not a de Polignac number, because 400003240432221 - 2²⁷ = 400003106214493 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400003240432291) 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, 31288866 + ... + 42178188.

It is an arithmetic number, because the mean of its divisors is an integer number (18773357915860).

Almost surely, 2^{400003240432221} is an apocalyptic number.

It is an amenable number.

400003240432221 is a deficient number, since it is larger than the sum of its proper divisors (200744212875299).

400003240432221 is a wasteful number, since it uses less digits than its factorization.

400003240432221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10908042 (or 10908036 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 400003240432221 its reverse (122234042300004), we get a palindrome (522237282732225).

The spelling of 400003240432221 in words is "four hundred trillion, three billion, two hundred forty million, four hundred thirty-two thousand, two hundred twenty-one".