51403057 has 4 divisors (see below), whose sum is σ = 52372980. Its totient is φ = 50433136.

The previous prime is 51403039. The next prime is 51403073. The reversal of 51403057 is 75030415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33628401 + 17774656 = 5799^2 + 4216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51403057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51403097) 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, 484882 + ... + 484987.

It is an arithmetic number, because the mean of its divisors is an integer number (13093245).

Almost surely, 2^51403057 is an apocalyptic number.

It is an amenable number.

51403057 is a deficient number, since it is larger than the sum of its proper divisors (969923).

51403057 is an equidigital number, since it uses as much as digits as its factorization.

51403057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969922.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 51403057 is about 7169.5925267758. The cubic root of 51403057 is about 371.8173482833.

The spelling of 51403057 in words is "fifty-one million, four hundred three thousand, fifty-seven".