2123145156 has 48 divisors (see below), whose sum is σ = 5408121600. Its totient is φ = 642930720.

The previous prime is 2123145151. The next prime is 2123145161. The reversal of 2123145156 is 6515413212.

It is an interprime number because it is at equal distance from previous prime (2123145151) and next prime (2123145161).

It is not an unprimeable number, because it can be changed into a prime (2123145151) 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, 219535 + ... + 229001.

It is an arithmetic number, because the mean of its divisors is an integer number (112669200).

Almost surely, 2^2123145156 is an apocalyptic number.

It is an amenable number.

2123145156 is an abundant number, since it is smaller than the sum of its proper divisors (3284976444).

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

2123145156 is a wasteful number, since it uses less digits than its factorization.

2123145156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184 (or 11182 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 2123145156 is about 46077.5992864212. The cubic root of 2123145156 is about 1285.2666216375.

Adding to 2123145156 its reverse (6515413212), we get a palindrome (8638558368).

It can be divided in two parts, 212314 and 5156, that added together give a triangular number (217470 = T₆₅₉).

The spelling of 2123145156 in words is "two billion, one hundred twenty-three million, one hundred forty-five thousand, one hundred fifty-six".