400231 has 8 divisors (see below), whose sum is σ = 456624. Its totient is φ = 347520.

The previous prime is 400217. The next prime is 400237. The reversal of 400231 is 132004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400231 - 2⁵ = 400199 is a prime.

It is a super-2 number, since 2×400231² = 320369706722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 1126.

It is an arithmetic number, because the mean of its divisors is an integer number (57078).

2⁴⁰⁰²³¹ is an apocalyptic number.

400231 is a deficient number, since it is larger than the sum of its proper divisors (56393).

400231 is a wasteful number, since it uses less digits than its factorization.

400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 400231 is about 632.6381272102. The cubic root of 400231 is about 73.6948107646.

Adding to 400231 its reverse (132004), we get a palindrome (532235).

The spelling of 400231 in words is "four hundred thousand, two hundred thirty-one".