71442344431 has 4 divisors (see below), whose sum is σ = 71442903312. Its totient is φ = 71441785552.

The previous prime is 71442344423. The next prime is 71442344437. The reversal of 71442344431 is 13444324417.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 71442344431 - 2³ = 71442344423 is a prime.

It is a super-2 number, since 2×71442344431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71442344437) 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 in 3 ways as a sum of consecutive naturals, for example, 17451 + ... + 378403.

It is an arithmetic number, because the mean of its divisors is an integer number (17860725828).

Almost surely, 2^71442344431 is an apocalyptic number.

71442344431 is a deficient number, since it is larger than the sum of its proper divisors (558881).

71442344431 is a wasteful number, since it uses less digits than its factorization.

71442344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558880.

The product of its digits is 129024, while the sum is 37.

Adding to 71442344431 its reverse (13444324417), we get a palindrome (84886668848).

The spelling of 71442344431 in words is "seventy-one billion, four hundred forty-two million, three hundred forty-four thousand, four hundred thirty-one".