2051623543 has 4 divisors (see below), whose sum is σ = 2051737408. Its totient is φ = 2051509680.

The previous prime is 2051623537. The next prime is 2051623571. The reversal of 2051623543 is 3453261502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051623543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051623583) 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 3 ways as a sum of consecutive naturals, for example, 23271 + ... + 68152.

It is an arithmetic number, because the mean of its divisors is an integer number (512934352).

Almost surely, 2^2051623543 is an apocalyptic number.

2051623543 is a deficient number, since it is larger than the sum of its proper divisors (113865).

2051623543 is an equidigital number, since it uses as much as digits as its factorization.

2051623543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113864.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2051623543 is about 45294.8511753820. The cubic root of 2051623543 is about 1270.6693607071.

The spelling of 2051623543 in words is "two billion, fifty-one million, six hundred twenty-three thousand, five hundred forty-three".