51115057 has 4 divisors (see below), whose sum is σ = 58417216. Its totient is φ = 43812900.

The previous prime is 51115049. The next prime is 51115079. The reversal of 51115057 is 75051115.

51115057 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51115057 - 2³ = 51115049 is a prime.

It is a super-2 number, since 2×51115057² = 5225498104226498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51115157) 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, 3651069 + ... + 3651082.

It is an arithmetic number, because the mean of its divisors is an integer number (14604304).

Almost surely, 2^51115057 is an apocalyptic number.

It is an amenable number.

51115057 is a deficient number, since it is larger than the sum of its proper divisors (7302159).

51115057 is an equidigital number, since it uses as much as digits as its factorization.

51115057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302158.

The product of its (nonzero) digits is 875, while the sum is 25.

The square root of 51115057 is about 7149.4794915434. The cubic root of 51115057 is about 371.1216438147.

The spelling of 51115057 in words is "fifty-one million, one hundred fifteen thousand, fifty-seven".