2123515004 has 24 divisors (see below), whose sum is σ = 4131109248. Its totient is φ = 948467520.

The previous prime is 2123514977. The next prime is 2123515007. The reversal of 2123515004 is 4005153212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123515007) 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, 657047 + ... + 660270.

It is an arithmetic number, because the mean of its divisors is an integer number (172129552).

Almost surely, 2^2123515004 is an apocalyptic number.

It is an amenable number.

2123515004 is a deficient number, since it is larger than the sum of its proper divisors (2007594244).

2123515004 is a wasteful number, since it uses less digits than its factorization.

2123515004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317365 (or 1317363 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2123515004 is about 46081.6124283862. The cubic root of 2123515004 is about 1285.3412476688.

Adding to 2123515004 its reverse (4005153212), we get a palindrome (6128668216).

The spelling of 2123515004 in words is "two billion, one hundred twenty-three million, five hundred fifteen thousand, four".