165223442 has 8 divisors (see below), whose sum is σ = 262413756. Its totient is φ = 77752192.

The previous prime is 165223417. The next prime is 165223447. The reversal of 165223442 is 244322561.

It can be written as a sum of positive squares in 2 ways, for example, as 157276681 + 7946761 = 12541^2 + 2819^2 .

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

It is not an unprimeable number, because it can be changed into a prime (165223447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2429723 + ... + 2429790.

Almost surely, 2^165223442 is an apocalyptic number.

165223442 is a deficient number, since it is larger than the sum of its proper divisors (97190314).

165223442 is a wasteful number, since it uses less digits than its factorization.

165223442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859532.

The product of its digits is 11520, while the sum is 29.

The square root of 165223442 is about 12853.9271041966. The cubic root of 165223442 is about 548.7281266285.

The spelling of 165223442 in words is "one hundred sixty-five million, two hundred twenty-three thousand, four hundred forty-two".