40242232631 has 2 divisors, whose sum is σ = 40242232632. Its totient is φ = 40242232630.

The previous prime is 40242232619. The next prime is 40242232649. The reversal of 40242232631 is 13623224204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40242232631 is a prime.

It is a super-2 number, since 2×40242232631² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40242232594 and 40242232603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40242232231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121116315 + 20121116316.

It is an arithmetic number, because the mean of its divisors is an integer number (20121116316).

Almost surely, 2^40242232631 is an apocalyptic number.

40242232631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40242232631 is an equidigital number, since it uses as much as digits as its factorization.

40242232631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 40242232631 its reverse (13623224204), we get a palindrome (53865456835).

The spelling of 40242232631 in words is "forty billion, two hundred forty-two million, two hundred thirty-two thousand, six hundred thirty-one".