240400131 has 4 divisors (see below), whose sum is σ = 320533512. Its totient is φ = 160266752.

The previous prime is 240400129. The next prime is 240400157. The reversal of 240400131 is 131004042.

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 240400131 - 2¹ = 240400129 is a prime.

It is a super-2 number, since 2×240400131² = 115584445969634322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240400131.

It is not an unprimeable number, because it can be changed into a prime (240400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40066686 + ... + 40066691.

It is an arithmetic number, because the mean of its divisors is an integer number (80133378).

Almost surely, 2^240400131 is an apocalyptic number.

240400131 is a deficient number, since it is larger than the sum of its proper divisors (80133381).

240400131 is an equidigital number, since it uses as much as digits as its factorization.

240400131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80133380.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 240400131 is about 15504.8421791387. The cubic root of 240400131 is about 621.7916705632.

Adding to 240400131 its reverse (131004042), we get a palindrome (371404173).

The spelling of 240400131 in words is "two hundred forty million, four hundred thousand, one hundred thirty-one".