2161037356 has 12 divisors (see below), whose sum is σ = 3783732568. Its totient is φ = 1079970912.

The previous prime is 2161037353. The next prime is 2161037387. The reversal of 2161037356 is 6537301612.

It is not an unprimeable number, because it can be changed into a prime (2161037353) 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, 128001 + ... + 143896.

Almost surely, 2^2161037356 is an apocalyptic number.

It is an amenable number.

2161037356 is a deficient number, since it is larger than the sum of its proper divisors (1622695212).

2161037356 is a wasteful number, since it uses less digits than its factorization.

2161037356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273888 (or 273886 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 2161037356 is about 46486.9589885163. The cubic root of 2161037356 is about 1292.8677175441.

Adding to 2161037356 its reverse (6537301612), we get a palindrome (8698338968).

The spelling of 2161037356 in words is "two billion, one hundred sixty-one million, thirty-seven thousand, three hundred fifty-six".