400221210231 has 48 divisors (see below), whose sum is σ = 586764569664. Its totient is φ = 262851443712.

The previous prime is 400221210229. The next prime is 400221210269. The reversal of 400221210231 is 132012122004.

It is a happy number.

400221210231 is a `hidden beast` number, since 4 + 0 + 0 + 221 + 210 + 231 = 666.

It is not a de Polignac number, because 400221210231 - 2¹ = 400221210229 is a prime.

It is a super-2 number, since 2×400221210231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400221210331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102173485 + ... + 102177401.

It is an arithmetic number, because the mean of its divisors is an integer number (12224261868).

Almost surely, 2^400221210231 is an apocalyptic number.

400221210231 is a deficient number, since it is larger than the sum of its proper divisors (186543359433).

400221210231 is a wasteful number, since it uses less digits than its factorization.

400221210231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680 (or 4677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 400221210231 its reverse (132012122004), we get a palindrome (532233332235).

The spelling of 400221210231 in words is "four hundred billion, two hundred twenty-one million, two hundred ten thousand, two hundred thirty-one".