2123315544 has 64 divisors (see below), whose sum is σ = 6214602240. Its totient is φ = 591863040.

The previous prime is 2123315527. The next prime is 2123315549. The reversal of 2123315544 is 4455133212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123315549) 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, 147244 + ... + 161019.

It is an arithmetic number, because the mean of its divisors is an integer number (97103160).

Almost surely, 2^2123315544 is an apocalyptic number.

2123315544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2123315544 is an abundant number, since it is smaller than the sum of its proper divisors (4091286696).

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

2123315544 is a wasteful number, since it uses less digits than its factorization.

2123315544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308320 (or 308316 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 2123315544 is about 46079.4481737792. The cubic root of 2123315544 is about 1285.3010027302.

Adding to 2123315544 its reverse (4455133212), we get a palindrome (6578448756).

The spelling of 2123315544 in words is "two billion, one hundred twenty-three million, three hundred fifteen thousand, five hundred forty-four".