43240242231 has 40 divisors (see below), whose sum is σ = 66451825440. Its totient is φ = 28008047808.

The previous prime is 43240242197. The next prime is 43240242233. The reversal of 43240242231 is 13224204234.

43240242231 is a `hidden beast` number, since 4 + 32 + 402 + 4 + 223 + 1 = 666.

It is not a de Polignac number, because 43240242231 - 2²² = 43236047927 is a prime.

It is a super-2 number, since 2×43240242231² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 43240242195 and 43240242204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43240242233) 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 39 ways as a sum of consecutive naturals, for example, 393285 + ... + 491073.

It is an arithmetic number, because the mean of its divisors is an integer number (1661295636).

Almost surely, 2^43240242231 is an apocalyptic number.

43240242231 is a deficient number, since it is larger than the sum of its proper divisors (23211583209).

43240242231 is a wasteful number, since it uses less digits than its factorization.

43240242231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97957 (or 97948 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 43240242231 its reverse (13224204234), we get a palindrome (56464446465).

The spelling of 43240242231 in words is "forty-three billion, two hundred forty million, two hundred forty-two thousand, two hundred thirty-one".