1822135881 has 16 divisors (see below), whose sum is σ = 2472880320. Its totient is φ = 1193111040.

The previous prime is 1822135873. The next prime is 1822135883. The reversal of 1822135881 is 1885312281.

It is not a de Polignac number, because 1822135881 - 2³ = 1822135873 is a prime.

It is a super-2 number, since 2×1822135881² = 6640358337655292322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1822135883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229921 + ... + 237713.

It is an arithmetic number, because the mean of its divisors is an integer number (154555020).

Almost surely, 2^1822135881 is an apocalyptic number.

It is an amenable number.

1822135881 is a deficient number, since it is larger than the sum of its proper divisors (650744439).

1822135881 is a wasteful number, since it uses less digits than its factorization.

1822135881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176.

The product of its digits is 30720, while the sum is 39.

The square root of 1822135881 is about 42686.4835867280. The cubic root of 1822135881 is about 1221.4065746399.

The spelling of 1822135881 in words is "one billion, eight hundred twenty-two million, one hundred thirty-five thousand, eight hundred eighty-one".