2123450531 has 8 divisors (see below), whose sum is σ = 2134157520. Its totient is φ = 2112769152.

The previous prime is 2123450521. The next prime is 2123450561. The reversal of 2123450531 is 1350543212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123450531 is a prime.

It is a super-2 number, since 2×2123450531² = 9018084315208363922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123450531.

It is not an unprimeable number, because it can be changed into a prime (2123450521) 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, 172136 + ... + 184058.

It is an arithmetic number, because the mean of its divisors is an integer number (266769690).

Almost surely, 2^2123450531 is an apocalyptic number.

2123450531 is a deficient number, since it is larger than the sum of its proper divisors (10706989).

2123450531 is a wasteful number, since it uses less digits than its factorization.

2123450531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 2123450531 is about 46080.9128707321. The cubic root of 2123450531 is about 1285.3282392614.

Adding to 2123450531 its reverse (1350543212), we get a palindrome (3473993743).

The spelling of 2123450531 in words is "two billion, one hundred twenty-three million, four hundred fifty thousand, five hundred thirty-one".