2151454543 has 4 divisors (see below), whose sum is σ = 2458805200. Its totient is φ = 1844103888.

The previous prime is 2151454517. The next prime is 2151454553. The reversal of 2151454543 is 3454541512.

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 2151454543 - 2⁹ = 2151454031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151454499 and 2151454508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151454553) 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, 153675318 + ... + 153675331.

It is an arithmetic number, because the mean of its divisors is an integer number (614701300).

Almost surely, 2^2151454543 is an apocalyptic number.

2151454543 is a deficient number, since it is larger than the sum of its proper divisors (307350657).

2151454543 is an equidigital number, since it uses as much as digits as its factorization.

2151454543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307350656.

The product of its digits is 48000, while the sum is 34.

The square root of 2151454543 is about 46383.7745661131. The cubic root of 2151454543 is about 1290.9538731486.

The spelling of 2151454543 in words is "two billion, one hundred fifty-one million, four hundred fifty-four thousand, five hundred forty-three".