51403043 has 4 divisors (see below), whose sum is σ = 51608088. Its totient is φ = 51198000.

The previous prime is 51403039. The next prime is 51403073. The reversal of 51403043 is 34030415.

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 51403043 - 2² = 51403039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51403073) 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, 102146 + ... + 102647.

It is an arithmetic number, because the mean of its divisors is an integer number (12902022).

Almost surely, 2^51403043 is an apocalyptic number.

51403043 is a deficient number, since it is larger than the sum of its proper divisors (205045).

51403043 is a wasteful number, since it uses less digits than its factorization.

51403043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205044.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 51403043 is about 7169.5915504302. The cubic root of 51403043 is about 371.8173145275.

Adding to 51403043 its reverse (34030415), we get a palindrome (85433458).

The spelling of 51403043 in words is "fifty-one million, four hundred three thousand, forty-three".