400566231 has 12 divisors (see below), whose sum is σ = 623103208. Its totient is φ = 246502224.

The previous prime is 400566211. The next prime is 400566233. The reversal of 400566231 is 132665004.

It is not a de Polignac number, because 400566231 - 2¹⁴ = 400549847 is a prime.

It is a super-2 number, since 2×400566231² = 320906610835090722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400566195 and 400566204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400566233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1711705 + ... + 1711938.

Almost surely, 2^400566231 is an apocalyptic number.

400566231 is a deficient number, since it is larger than the sum of its proper divisors (222536977).

400566231 is a wasteful number, since it uses less digits than its factorization.

400566231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423662 (or 3423659 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 400566231 is about 20014.1507688935. The cubic root of 400566231 is about 737.1538046128.

The spelling of 400566231 in words is "four hundred million, five hundred sixty-six thousand, two hundred thirty-one".