400421235205 has 16 divisors (see below), whose sum is σ = 481139633664. Its totient is φ = 319914429120.

The previous prime is 400421235199. The next prime is 400421235233. The reversal of 400421235205 is 502532124004.

It is not a de Polignac number, because 400421235205 - 2¹⁹ = 400420710917 is a prime.

It is a super-3 number, since 3×400421235205³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18803494 + ... + 18824776.

It is an arithmetic number, because the mean of its divisors is an integer number (30071227104).

Almost surely, 2^400421235205 is an apocalyptic number.

It is an amenable number.

400421235205 is a deficient number, since it is larger than the sum of its proper divisors (80718398459).

400421235205 is a wasteful number, since it uses less digits than its factorization.

400421235205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26076.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 400421235205 its reverse (502532124004), we get a palindrome (902953359209).

The spelling of 400421235205 in words is "four hundred billion, four hundred twenty-one million, two hundred thirty-five thousand, two hundred five".