2161037355 has 32 divisors (see below), whose sum is σ = 3554786304. Its totient is φ = 1120242816.

The previous prime is 2161037353. The next prime is 2161037387. The reversal of 2161037355 is 5537301612.

It is not a de Polignac number, because 2161037355 - 2¹ = 2161037353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161037353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 890674 + ... + 893096.

It is an arithmetic number, because the mean of its divisors is an integer number (111087072).

Almost surely, 2^2161037355 is an apocalyptic number.

2161037355 is a deficient number, since it is larger than the sum of its proper divisors (1393748949).

2161037355 is a wasteful number, since it uses less digits than its factorization.

2161037355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4075.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 2161037355 is about 46486.9589777606. The cubic root of 2161037355 is about 1292.8677173447.

Adding to 2161037355 its reverse (5537301612), we get a palindrome (7698338967).

The spelling of 2161037355 in words is "two billion, one hundred sixty-one million, thirty-seven thousand, three hundred fifty-five".