2161146331 has 6 divisors (see below), whose sum is σ = 2212576260. Its totient is φ = 2110885308.

The previous prime is 2161146329. The next prime is 2161146343. The reversal of 2161146331 is 1336411612.

It is not a de Polignac number, because 2161146331 - 2¹ = 2161146329 is a prime.

It is a super-2 number, since 2×2161146331² = 9341106927989523122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161146331.

It is not an unprimeable number, because it can be changed into a prime (2161146311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 582561 + ... + 586258.

It is an arithmetic number, because the mean of its divisors is an integer number (368762710).

Almost surely, 2^2161146331 is an apocalyptic number.

2161146331 is a deficient number, since it is larger than the sum of its proper divisors (51429929).

2161146331 is an equidigital number, since it uses as much as digits as its factorization.

2161146331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168905 (or 1168862 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 2161146331 is about 46488.1310766522. The cubic root of 2161146331 is about 1292.8894490659.

Adding to 2161146331 its reverse (1336411612), we get a palindrome (3497557943).

The spelling of 2161146331 in words is "two billion, one hundred sixty-one million, one hundred forty-six thousand, three hundred thirty-one".