622161281 has 12 divisors (see below), whose sum is σ = 740572272. Its totient is φ = 520877448.

The previous prime is 622161269. The next prime is 622161283. The reversal of 622161281 is 182161226.

It is a de Polignac number, because none of the positive numbers 2^k-622161281 is a prime.

It is a super-2 number, since 2×622161281² = 774169319151121922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (622161283) 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 11 ways as a sum of consecutive naturals, for example, 145535 + ... + 149748.

It is an arithmetic number, because the mean of its divisors is an integer number (61714356).

Almost surely, 2^622161281 is an apocalyptic number.

It is an amenable number.

622161281 is a deficient number, since it is larger than the sum of its proper divisors (118410991).

622161281 is a wasteful number, since it uses less digits than its factorization.

622161281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295340 (or 295333 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 622161281 is about 24943.1610065765. The cubic root of 622161281 is about 853.6915709652.

The spelling of 622161281 in words is "six hundred twenty-two million, one hundred sixty-one thousand, two hundred eighty-one".