2123456502 has 64 divisors (see below), whose sum is σ = 4765521600. Its totient is φ = 627486720.

The previous prime is 2123456497. The next prime is 2123456513. The reversal of 2123456502 is 2056543212.

It is a self number, because there is not a number n which added to its sum of digits gives 2123456502.

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, 112524 + ... + 130032.

It is an arithmetic number, because the mean of its divisors is an integer number (74461275).

Almost surely, 2^2123456502 is an apocalyptic number.

2123456502 is an abundant number, since it is smaller than the sum of its proper divisors (2642065098).

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

2123456502 is a wasteful number, since it uses less digits than its factorization.

2123456502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17601.

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

The square root of 2123456502 is about 46080.9776588996. The cubic root of 2123456502 is about 1285.3294440124.

Adding to 2123456502 its reverse (2056543212), we get a palindrome (4179999714).

The spelling of 2123456502 in words is "two billion, one hundred twenty-three million, four hundred fifty-six thousand, five hundred two".