2112172615 has 16 divisors (see below), whose sum is σ = 2898155520. Its totient is φ = 1447616160.

The previous prime is 2112172607. The next prime is 2112172619. The reversal of 2112172615 is 5162712112.

It is not a de Polignac number, because 2112172615 - 2³ = 2112172607 is a prime.

It is a super-2 number, since 2×2112172615² = 8922546311111876450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112172619) 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, 60426 + ... + 88744.

It is an arithmetic number, because the mean of its divisors is an integer number (181134720).

Almost surely, 2^2112172615 is an apocalyptic number.

2112172615 is a deficient number, since it is larger than the sum of its proper divisors (785982905).

2112172615 is a wasteful number, since it uses less digits than its factorization.

2112172615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30462.

The product of its digits is 1680, while the sum is 28.

The square root of 2112172615 is about 45958.3791598442. The cubic root of 2112172615 is about 1283.0486848680.

Adding to 2112172615 its reverse (5162712112), we get a palindrome (7274884727).

The spelling of 2112172615 in words is "two billion, one hundred twelve million, one hundred seventy-two thousand, six hundred fifteen".