2121543250 has 32 divisors (see below), whose sum is σ = 3988258560. Its totient is φ = 845042800.

The previous prime is 2121543241. The next prime is 2121543251. The reversal of 2121543250 is 523451212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (2121543251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41997 + ... + 77503.

It is an arithmetic number, because the mean of its divisors is an integer number (124633080).

Almost surely, 2^2121543250 is an apocalyptic number.

2121543250 is a deficient number, since it is larger than the sum of its proper divisors (1866715310).

2121543250 is a wasteful number, since it uses less digits than its factorization.

2121543250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35763 (or 35753 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2121543250 is about 46060.2133082338. The cubic root of 2121543250 is about 1284.9432971694.

Adding to 2121543250 its reverse (523451212), we get a palindrome (2644994462).

The spelling of 2121543250 in words is "two billion, one hundred twenty-one million, five hundred forty-three thousand, two hundred fifty".