400031221110 has 64 divisors (see below), whose sum is σ = 964021201920. Its totient is φ = 106237028480.

The previous prime is 400031221103. The next prime is 400031221111. The reversal of 400031221110 is 11122130004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 400031221110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031221111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13266631 + ... + 13296749.

It is an arithmetic number, because the mean of its divisors is an integer number (15062831280).

Almost surely, 2^400031221110 is an apocalyptic number.

400031221110 is an abundant number, since it is smaller than the sum of its proper divisors (563989980810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400031221110 is a wasteful number, since it uses less digits than its factorization.

400031221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31933.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 400031221110 its reverse (11122130004), we get a palindrome (411153351114).

The spelling of 400031221110 in words is "four hundred billion, thirty-one million, two hundred twenty-one thousand, one hundred ten".