2400131231 has 4 divisors (see below), whose sum is σ = 2422562472. Its totient is φ = 2377699992.

The previous prime is 2400131183. The next prime is 2400131297. The reversal of 2400131231 is 1321310042.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2400131231 is a prime.

It is a super-2 number, since 2×2400131231² = 11521259852043150722, 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 (2400131131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11215460 + ... + 11215673.

It is an arithmetic number, because the mean of its divisors is an integer number (605640618).

Almost surely, 2^2400131231 is an apocalyptic number.

2400131231 is a deficient number, since it is larger than the sum of its proper divisors (22431241).

2400131231 is a wasteful number, since it uses less digits than its factorization.

2400131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22431240.

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

The square root of 2400131231 is about 48991.1342081401. The cubic root of 2400131231 is about 1338.8903025961.

Adding to 2400131231 its reverse (1321310042), we get a palindrome (3721441273).

The spelling of 2400131231 in words is "two billion, four hundred million, one hundred thirty-one thousand, two hundred thirty-one".