162214721 has 4 divisors (see below), whose sum is σ = 162260052. Its totient is φ = 162169392.

The previous prime is 162214711. The next prime is 162214727. The reversal of 162214721 is 127412261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130416400 + 31798321 = 11420^2 + 5639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162214721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162214727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16790 + ... + 24623.

It is an arithmetic number, because the mean of its divisors is an integer number (40565013).

Almost surely, 2^162214721 is an apocalyptic number.

It is an amenable number.

162214721 is a deficient number, since it is larger than the sum of its proper divisors (45331).

162214721 is an equidigital number, since it uses as much as digits as its factorization.

162214721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45330.

The product of its digits is 1344, while the sum is 26.

The square root of 162214721 is about 12736.3543056873. The cubic root of 162214721 is about 545.3769196359.

Adding to 162214721 its reverse (127412261), we get a palindrome (289626982).

The spelling of 162214721 in words is "one hundred sixty-two million, two hundred fourteen thousand, seven hundred twenty-one".