2161442316 has 48 divisors (see below), whose sum is σ = 5510977920. Its totient is φ = 653896320.

The previous prime is 2161442303. The next prime is 2161442317. The reversal of 2161442316 is 6132441612.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2161442317) 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, 68175 + ... + 94713.

It is an arithmetic number, because the mean of its divisors is an integer number (114812040).

Almost surely, 2^2161442316 is an apocalyptic number.

It is an amenable number.

2161442316 is an abundant number, since it is smaller than the sum of its proper divisors (3349535604).

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

2161442316 is a wasteful number, since it uses less digits than its factorization.

2161442316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27174 (or 27172 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 2161442316 is about 46491.3144146302. The cubic root of 2161442316 is about 1292.9484699675.

Adding to 2161442316 its reverse (6132441612), we get a palindrome (8293883928).

The spelling of 2161442316 in words is "two billion, one hundred sixty-one million, four hundred forty-two thousand, three hundred sixteen".