400221303512 has 16 divisors (see below), whose sum is σ = 751025552400. Its totient is φ = 199947822880.

The previous prime is 400221303509. The next prime is 400221303529. The reversal of 400221303512 is 215303122004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20343164 + ... + 20362827.

It is an arithmetic number, because the mean of its divisors is an integer number (46939097025).

Almost surely, 2^400221303512 is an apocalyptic number.

It is an amenable number.

400221303512 is a deficient number, since it is larger than the sum of its proper divisors (350804248888).

400221303512 is a wasteful number, since it uses less digits than its factorization.

400221303512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40707226 (or 40707222 counting only the distinct ones).

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

Adding to 400221303512 its reverse (215303122004), we get a palindrome (615524425516).

The spelling of 400221303512 in words is "four hundred billion, two hundred twenty-one million, three hundred three thousand, five hundred twelve".