400231135 has 16 divisors (see below), whose sum is σ = 495331200. Its totient is φ = 310255360.

The previous prime is 400231127. The next prime is 400231171. The reversal of 400231135 is 531132004.

It is not a de Polignac number, because 400231135 - 2³ = 400231127 is a prime.

It is a super-3 number, since 3×400231135³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23994 + ... + 37096.

It is an arithmetic number, because the mean of its divisors is an integer number (30958200).

Almost surely, 2^400231135 is an apocalyptic number.

400231135 is a deficient number, since it is larger than the sum of its proper divisors (95100065).

400231135 is a wasteful number, since it uses less digits than its factorization.

400231135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13298.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 400231135 is about 20005.7775405006. Note that the first 3 decimals coincide. The cubic root of 400231135 is about 736.9481905051.

Adding to 400231135 its reverse (531132004), we get a palindrome (931363139).

The spelling of 400231135 in words is "four hundred million, two hundred thirty-one thousand, one hundred thirty-five".