400134231 has 24 divisors (see below), whose sum is σ = 661115520. Its totient is φ = 228448656.

The previous prime is 400134223. The next prime is 400134233. The reversal of 400134231 is 132431004.

400134231 is a `hidden beast` number, since 400 + 1 + 34 + 231 = 666.

It is not a de Polignac number, because 400134231 - 2³ = 400134223 is a prime.

It is a super-2 number, since 2×400134231² = 320214805635922722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400134233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100036 + ... + 103958.

It is an arithmetic number, because the mean of its divisors is an integer number (27546480).

Almost surely, 2^400134231 is an apocalyptic number.

400134231 is a deficient number, since it is larger than the sum of its proper divisors (260981289).

400134231 is a wasteful number, since it uses less digits than its factorization.

400134231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555 (or 5552 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 400134231 is about 20003.3554935166. The cubic root of 400134231 is about 736.8887090492. Note that the first 3 decimals are identical.

Adding to 400134231 its reverse (132431004), we get a palindrome (532565235).

It can be divided in two parts, 40013 and 4231, that added together give a palindrome (44244).

The spelling of 400134231 in words is "four hundred million, one hundred thirty-four thousand, two hundred thirty-one".