2151233543 has 4 divisors (see below), whose sum is σ = 2225414040. Its totient is φ = 2077053048.

The previous prime is 2151233537. The next prime is 2151233587. The reversal of 2151233543 is 3453321512.

It is a happy number.

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 2151233543 - 2⁴ = 2151233527 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 74180467 = 2151233543 / (2 + 1 + 5 + 1 + 2 + 3 + 3 + 5 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151233443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37090205 + ... + 37090262.

It is an arithmetic number, because the mean of its divisors is an integer number (556353510).

Almost surely, 2^2151233543 is an apocalyptic number.

2151233543 is a deficient number, since it is larger than the sum of its proper divisors (74180497).

2151233543 is an equidigital number, since it uses as much as digits as its factorization.

2151233543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74180496.

The product of its digits is 10800, while the sum is 29.

The square root of 2151233543 is about 46381.3922063579. The cubic root of 2151233543 is about 1290.9096688565.

It can be divided in two parts, 21512 and 33543, that added together give a palindrome (55055).

The spelling of 2151233543 in words is "two billion, one hundred fifty-one million, two hundred thirty-three thousand, five hundred forty-three".