51057005 has 4 divisors (see below), whose sum is σ = 61268412. Its totient is φ = 40845600.

The previous prime is 51056981. The next prime is 51057011. The reversal of 51057005 is 50075015.

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 19909444 + 31147561 = 4462^2 + 5581^2 .

It is not a de Polignac number, because 51057005 - 2²⁴ = 34279789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105696 + ... + 5105705.

It is an arithmetic number, because the mean of its divisors is an integer number (15317103).

Almost surely, 2^51057005 is an apocalyptic number.

It is an amenable number.

51057005 is a deficient number, since it is larger than the sum of its proper divisors (10211407).

51057005 is a wasteful number, since it uses less digits than its factorization.

51057005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10211406.

The product of its (nonzero) digits is 875, while the sum is 23.

The square root of 51057005 is about 7145.4184622036. The cubic root of 51057005 is about 370.9810947857.

The spelling of 51057005 in words is "fifty-one million, fifty-seven thousand, five".