140421323531 has 2 divisors, whose sum is σ = 140421323532. Its totient is φ = 140421323530.

The previous prime is 140421323527. The next prime is 140421323543. The reversal of 140421323531 is 135323124041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140421323531 - 2² = 140421323527 is a prime.

It is a super-2 number, since 2×140421323531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140421323494 and 140421323503.

It is not a weakly prime, because it can be changed into another prime (140421323521) 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 as a sum of consecutive naturals, namely, 70210661765 + 70210661766.

It is an arithmetic number, because the mean of its divisors is an integer number (70210661766).

Almost surely, 2^140421323531 is an apocalyptic number.

140421323531 is a deficient number, since it is larger than the sum of its proper divisors (1).

140421323531 is an equidigital number, since it uses as much as digits as its factorization.

140421323531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 140421323531 its reverse (135323124041), we get a palindrome (275744447572).

The spelling of 140421323531 in words is "one hundred forty billion, four hundred twenty-one million, three hundred twenty-three thousand, five hundred thirty-one".