165222414421 has 8 divisors (see below), whose sum is σ = 165649856000. Its totient is φ = 164795278032.

The previous prime is 165222414407. The next prime is 165222414443. The reversal of 165222414421 is 124414222561.

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 165222414421 - 2⁷ = 165222414293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165222414521) 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, 1028455 + ... + 1178203.

It is an arithmetic number, because the mean of its divisors is an integer number (20706232000).

Almost surely, 2^165222414421 is an apocalyptic number.

It is an amenable number.

165222414421 is a deficient number, since it is larger than the sum of its proper divisors (427441579).

165222414421 is a wasteful number, since it uses less digits than its factorization.

165222414421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152595.

The product of its digits is 30720, while the sum is 34.

Adding to 165222414421 its reverse (124414222561), we get a palindrome (289636636982).

The spelling of 165222414421 in words is "one hundred sixty-five billion, two hundred twenty-two million, four hundred fourteen thousand, four hundred twenty-one".