1240041551431 has 2 divisors, whose sum is σ = 1240041551432. Its totient is φ = 1240041551430.

The previous prime is 1240041551429. The next prime is 1240041551473. The reversal of 1240041551431 is 1341551400421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240041551431 - 2¹ = 1240041551429 is a prime.

It is a super-2 number, since 2×1240041551431² (a number of 25 digits) contains 22 as substring.

Together with 1240041551429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1240041551393 and 1240041551402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240041551401) by changing a digit.

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 as a sum of consecutive naturals, namely, 620020775715 + 620020775716.

It is an arithmetic number, because the mean of its divisors is an integer number (620020775716).

Almost surely, 2^{1240041551431} is an apocalyptic number.

1240041551431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240041551431 is an equidigital number, since it uses as much as digits as its factorization.

1240041551431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 1240041551431 its reverse (1341551400421), we get a palindrome (2581592951852).

The spelling of 1240041551431 in words is "one trillion, two hundred forty billion, forty-one million, five hundred fifty-one thousand, four hundred thirty-one".