400134131 has 4 divisors (see below), whose sum is σ = 405199200. Its totient is φ = 395069064.

The previous prime is 400134079. The next prime is 400134149. The reversal of 400134131 is 131431004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400134131 - 2²² = 395939827 is a prime.

It is a super-2 number, since 2×400134131² = 320214645582250322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400134191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532416 + ... + 2532573.

It is an arithmetic number, because the mean of its divisors is an integer number (101299800).

Almost surely, 2^400134131 is an apocalyptic number.

400134131 is a deficient number, since it is larger than the sum of its proper divisors (5065069).

400134131 is an equidigital number, since it uses as much as digits as its factorization.

400134131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065068.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400134131 is about 20003.3529939358. The cubic root of 400134131 is about 736.8886476624. Note that the first 3 decimals are identical.

Adding to 400134131 its reverse (131431004), we get a palindrome (531565135).

It can be divided in two parts, 40013 and 4131, that added together give a palindrome (44144).

The spelling of 400134131 in words is "four hundred million, one hundred thirty-four thousand, one hundred thirty-one".