400031523212 has 24 divisors (see below), whose sum is σ = 705511059456. Its totient is φ = 198460981008.

The previous prime is 400031523209. The next prime is 400031523233. The reversal of 400031523212 is 212325130004.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 109628 + ... + 901155.

It is an arithmetic number, because the mean of its divisors is an integer number (29396294144).

Almost surely, 2^400031523212 is an apocalyptic number.

It is an amenable number.

400031523212 is a deficient number, since it is larger than the sum of its proper divisors (305479536244).

400031523212 is a wasteful number, since it uses less digits than its factorization.

400031523212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011557 (or 1011555 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 400031523212 its reverse (212325130004), we get a palindrome (612356653216).

The spelling of 400031523212 in words is "four hundred billion, thirty-one million, five hundred twenty-three thousand, two hundred twelve".