51143403 has 4 divisors (see below), whose sum is σ = 68191208. Its totient is φ = 34095600.

The previous prime is 51143387. The next prime is 51143413. The reversal of 51143403 is 30434115.

51143403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51143403 - 2⁴ = 51143387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51143403.

It is not an unprimeable number, because it can be changed into a prime (51143413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8523898 + ... + 8523903.

It is an arithmetic number, because the mean of its divisors is an integer number (17047802).

Almost surely, 2^51143403 is an apocalyptic number.

51143403 is a deficient number, since it is larger than the sum of its proper divisors (17047805).

51143403 is a wasteful number, since it uses less digits than its factorization.

51143403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17047804.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51143403 is about 7151.4615988622. The cubic root of 51143403 is about 371.1902333245.

Adding to 51143403 its reverse (30434115), we get a palindrome (81577518).

The spelling of 51143403 in words is "fifty-one million, one hundred forty-three thousand, four hundred three".