2112161637 has 4 divisors (see below), whose sum is σ = 2816215520. Its totient is φ = 1408107756.

The previous prime is 2112161629. The next prime is 2112161641. The reversal of 2112161637 is 7361612112.

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.

It is not a de Polignac number, because 2112161637 - 2³ = 2112161629 is a prime.

It is a super-2 number, since 2×2112161637² = 8922453561629039538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112161647) 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, 352026937 + ... + 352026942.

It is an arithmetic number, because the mean of its divisors is an integer number (704053880).

Almost surely, 2^2112161637 is an apocalyptic number.

It is an amenable number.

2112161637 is a deficient number, since it is larger than the sum of its proper divisors (704053883).

2112161637 is an equidigital number, since it uses as much as digits as its factorization.

2112161637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704053882.

The product of its digits is 3024, while the sum is 30.

The square root of 2112161637 is about 45958.2597255379. The cubic root of 2112161637 is about 1283.0464619858.

Adding to 2112161637 its reverse (7361612112), we get a palindrome (9473773749).

The spelling of 2112161637 in words is "two billion, one hundred twelve million, one hundred sixty-one thousand, six hundred thirty-seven".