400343121232 has 20 divisors (see below), whose sum is σ = 776466962656. Its totient is φ = 199964550240.

The previous prime is 400343121181. The next prime is 400343121337. The reversal of 400343121232 is 232121343004.

It is a super-2 number, since 2×400343121232² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400343121197 and 400343121206.

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, 12922194 + ... + 12953137.

Almost surely, 2^400343121232 is an apocalyptic number.

It is an amenable number.

400343121232 is a deficient number, since it is larger than the sum of its proper divisors (376123841424).

400343121232 is a wasteful number, since it uses less digits than its factorization.

400343121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25876306 (or 25876300 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 400343121232 its reverse (232121343004), we get a palindrome (632464464236).

The spelling of 400343121232 in words is "four hundred billion, three hundred forty-three million, one hundred twenty-one thousand, two hundred thirty-two".