2112167805 has 32 divisors (see below), whose sum is σ = 3903562368. Its totient is φ = 963840000.

The previous prime is 2112167803. The next prime is 2112167821. The reversal of 2112167805 is 5087612112.

It is not a de Polignac number, because 2112167805 - 2¹ = 2112167803 is a prime.

It is a super-2 number, since 2×2112167805² = 8922505672957036050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112167803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373696 + ... + 379305.

It is an arithmetic number, because the mean of its divisors is an integer number (121986324).

Almost surely, 2^2112167805 is an apocalyptic number.

It is an amenable number.

2112167805 is a deficient number, since it is larger than the sum of its proper divisors (1791394563).

2112167805 is a wasteful number, since it uses less digits than its factorization.

2112167805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753037.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 2112167805 is about 45958.3268298575. The cubic root of 2112167805 is about 1283.0477109152.

Adding to 2112167805 its reverse (5087612112), we get a palindrome (7199779917).

The spelling of 2112167805 in words is "two billion, one hundred twelve million, one hundred sixty-seven thousand, eight hundred five".