2161140361 has 8 divisors (see below), whose sum is σ = 2175957504. Its totient is φ = 2146360080.

The previous prime is 2161140343. The next prime is 2161140379. The reversal of 2161140361 is 1630411612.

It is an interprime number because it is at equal distance from previous prime (2161140343) and next prime (2161140379).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161140361 - 2²³ = 2152751753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2161140301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114015 + ... + 131611.

It is an arithmetic number, because the mean of its divisors is an integer number (271994688).

Almost surely, 2^2161140361 is an apocalyptic number.

It is an amenable number.

2161140361 is a deficient number, since it is larger than the sum of its proper divisors (14817143).

2161140361 is a wasteful number, since it uses less digits than its factorization.

2161140361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18431.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2161140361 is about 46488.0668666702. The cubic root of 2161140361 is about 1292.8882585624. Note that the first 3 decimals are identical.

Adding to 2161140361 its reverse (1630411612), we get a palindrome (3791551973).

The spelling of 2161140361 in words is "two billion, one hundred sixty-one million, one hundred forty thousand, three hundred sixty-one".