165322716431 has 8 divisors (see below), whose sum is σ = 167415306240. Its totient is φ = 163232525592.

The previous prime is 165322716359. The next prime is 165322716473. The reversal of 165322716431 is 134617223561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165322716431 - 2¹⁸ = 165322454287 is a prime.

It is a super-2 number, since 2×165322716431² (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 (165322716331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460841 + ... + 736898.

It is an arithmetic number, because the mean of its divisors is an integer number (20926913280).

Almost surely, 2^165322716431 is an apocalyptic number.

165322716431 is a deficient number, since it is larger than the sum of its proper divisors (2092589809).

165322716431 is a wasteful number, since it uses less digits than its factorization.

165322716431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199485.

The product of its digits is 181440, while the sum is 41.

Adding to 165322716431 its reverse (134617223561), we get a palindrome (299939939992).

The spelling of 165322716431 in words is "one hundred sixty-five billion, three hundred twenty-two million, seven hundred sixteen thousand, four hundred thirty-one".