2143530451 has 4 divisors (see below), whose sum is σ = 2143834600. Its totient is φ = 2143226304.

The previous prime is 2143530439. The next prime is 2143530461. The reversal of 2143530451 is 1540353412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2143530451 - 2²⁵ = 2109976019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143530461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141246 + ... + 155683.

It is an arithmetic number, because the mean of its divisors is an integer number (535958650).

Almost surely, 2^2143530451 is an apocalyptic number.

2143530451 is a deficient number, since it is larger than the sum of its proper divisors (304149).

2143530451 is an equidigital number, since it uses as much as digits as its factorization.

2143530451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304148.

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

The square root of 2143530451 is about 46298.2769765787. The cubic root of 2143530451 is about 1289.3670053108.

Adding to 2143530451 its reverse (1540353412), we get a palindrome (3683883863).

The spelling of 2143530451 in words is "two billion, one hundred forty-three million, five hundred thirty thousand, four hundred fifty-one".