162216623281 has 4 divisors (see below), whose sum is σ = 163822728564. Its totient is φ = 160610518000.

The previous prime is 162216623263. The next prime is 162216623291. The reversal of 162216623281 is 182326612261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182326612261 = 82847 ⋅2200763.

It can be written as a sum of positive squares in 2 ways, for example, as 79152195600 + 83064427681 = 281340^2 + 288209^2 .

It is a cyclic number.

It is not a de Polignac number, because 162216623281 - 2¹³ = 162216615089 is a prime.

It is a super-2 number, since 2×162216623281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162216623291) 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, 803052490 + ... + 803052691.

It is an arithmetic number, because the mean of its divisors is an integer number (40955682141).

Almost surely, 2^162216623281 is an apocalyptic number.

It is an amenable number.

162216623281 is a deficient number, since it is larger than the sum of its proper divisors (1606105283).

162216623281 is a wasteful number, since it uses less digits than its factorization.

162216623281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606105282.

The product of its digits is 82944, while the sum is 40.

The spelling of 162216623281 in words is "one hundred sixty-two billion, two hundred sixteen million, six hundred twenty-three thousand, two hundred eighty-one".