51243043 has 4 divisors (see below), whose sum is σ = 51964848. Its totient is φ = 50521240.

The previous prime is 51243041. The next prime is 51243053. The reversal of 51243043 is 34034215.

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 51243043 - 2¹ = 51243041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51243041) 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, 360796 + ... + 360937.

It is an arithmetic number, because the mean of its divisors is an integer number (12991212).

Almost surely, 2^51243043 is an apocalyptic number.

51243043 is a deficient number, since it is larger than the sum of its proper divisors (721805).

51243043 is an equidigital number, since it uses as much as digits as its factorization.

51243043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721804.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 51243043 is about 7158.4246171906. The cubic root of 51243043 is about 371.4311337454.

Adding to 51243043 its reverse (34034215), we get a palindrome (85277258).

The spelling of 51243043 in words is "fifty-one million, two hundred forty-three thousand, forty-three".