42431356465 has 16 divisors (see below), whose sum is σ = 53928491472. Its totient is φ = 31939006464.

The previous prime is 42431356421. The next prime is 42431356483. The reversal of 42431356465 is 56465313424.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 11884706289 + 30546650176 = 109017^2 + 174776^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431356465 - 2¹¹ = 42431354417 is a prime.

It is a super-2 number, since 2×42431356465² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 227977 + ... + 369913.

It is an arithmetic number, because the mean of its divisors is an integer number (3370530717).

Almost surely, 2^42431356465 is an apocalyptic number.

It is an amenable number.

42431356465 is a deficient number, since it is larger than the sum of its proper divisors (11497135007).

42431356465 is a wasteful number, since it uses less digits than its factorization.

42431356465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145476.

The product of its digits is 1036800, while the sum is 43.

Adding to 42431356465 its reverse (56465313424), we get a palindrome (98896669889).

The spelling of 42431356465 in words is "forty-two billion, four hundred thirty-one million, three hundred fifty-six thousand, four hundred sixty-five".