2123500456 has 48 divisors (see below), whose sum is σ = 5052680640. Its totient is φ = 827336160.

The previous prime is 2123500453. The next prime is 2123500523. The reversal of 2123500456 is 6540053212.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (2123500453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241920 + ... + 250543.

It is an arithmetic number, because the mean of its divisors is an integer number (105264180).

Almost surely, 2^2123500456 is an apocalyptic number.

It is an amenable number.

2123500456 is an abundant number, since it is smaller than the sum of its proper divisors (2929180184).

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

2123500456 is a wasteful number, since it uses less digits than its factorization.

2123500456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492494 (or 492483 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2123500456 is about 46081.4545777366. The cubic root of 2123500456 is about 1285.3383124117.

Adding to 2123500456 its reverse (6540053212), we get a palindrome (8663553668).

The spelling of 2123500456 in words is "two billion, one hundred twenty-three million, five hundred thousand, four hundred fifty-six".