2165340156 has 48 divisors (see below), whose sum is σ = 5777049600. Its totient is φ = 618367680.

The previous prime is 2165340131. The next prime is 2165340169. The reversal of 2165340156 is 6510435612.

It is a super-2 number, since 2×2165340156² = 9377395982372208672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212670 + ... + 222618.

It is an arithmetic number, because the mean of its divisors is an integer number (120355200).

Almost surely, 2^2165340156 is an apocalyptic number.

It is an amenable number.

2165340156 is an abundant number, since it is smaller than the sum of its proper divisors (3611709444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165340156 is a wasteful number, since it uses less digits than its factorization.

2165340156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12554 (or 12552 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 2165340156 is about 46533.2156206725. The cubic root of 2165340156 is about 1293.7252167112.

Adding to 2165340156 its reverse (6510435612), we get a palindrome (8675775768).

The spelling of 2165340156 in words is "two billion, one hundred sixty-five million, three hundred forty thousand, one hundred fifty-six".