51140443 has 4 divisors (see below), whose sum is σ = 51154840. Its totient is φ = 51126048.

The previous prime is 51140429. The next prime is 51140447. The reversal of 51140443 is 34404115.

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-51140443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51140447) 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, 2371 + ... + 10387.

It is an arithmetic number, because the mean of its divisors is an integer number (12788710).

Almost surely, 2^51140443 is an apocalyptic number.

51140443 is a deficient number, since it is larger than the sum of its proper divisors (14397).

51140443 is an equidigital number, since it uses as much as digits as its factorization.

51140443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14396.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 51140443 is about 7151.2546451654. The cubic root of 51140443 is about 371.1830721254.

Adding to 51140443 its reverse (34404115), we get a palindrome (85544558).

The spelling of 51140443 in words is "fifty-one million, one hundred forty thousand, four hundred forty-three".