2237818081 has 4 divisors (see below), whose sum is σ = 2355598000. Its totient is φ = 2120038164.

The previous prime is 2237818073. The next prime is 2237818133. The reversal of 2237818081 is 1808187322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1808187322 = 2 ⋅904093661.

It is not a de Polignac number, because 2237818081 - 2³ = 2237818073 is a prime.

It is a super-2 number, since 2×2237818081² = 10015659527301045122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2237816081) 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, 58889931 + ... + 58889968.

It is an arithmetic number, because the mean of its divisors is an integer number (588899500).

Almost surely, 2^2237818081 is an apocalyptic number.

It is an amenable number.

2237818081 is a deficient number, since it is larger than the sum of its proper divisors (117779919).

2237818081 is a wasteful number, since it uses less digits than its factorization.

2237818081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117779918.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 2237818081 is about 47305.5819222214. The cubic root of 2237818081 is about 1308.0015526250.

The spelling of 2237818081 in words is "two billion, two hundred thirty-seven million, eight hundred eighteen thousand, eighty-one".