2161146125 has 32 divisors (see below), whose sum is σ = 2860745472. Its totient is φ = 1626504000.

The previous prime is 2161146109. The next prime is 2161146167. The reversal of 2161146125 is 5216411612.

It is not a de Polignac number, because 2161146125 - 2⁴ = 2161146109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169214 + ... + 181536.

It is an arithmetic number, because the mean of its divisors is an integer number (89398296).

Almost surely, 2^2161146125 is an apocalyptic number.

2161146125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2161146125 is a deficient number, since it is larger than the sum of its proper divisors (699599347).

2161146125 is a wasteful number, since it uses less digits than its factorization.

2161146125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12422 (or 12412 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 2161146125 is about 46488.1288610329. The cubic root of 2161146125 is about 1292.8894079866.

Adding to 2161146125 its reverse (5216411612), we get a palindrome (7377557737).

The spelling of 2161146125 in words is "two billion, one hundred sixty-one million, one hundred forty-six thousand, one hundred twenty-five".