51161057 has 4 divisors (see below), whose sum is σ = 51375360. Its totient is φ = 50946756.

The previous prime is 51161021. The next prime is 51161063. The reversal of 51161057 is 75016115.

51161057 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 51161057 - 2¹⁶ = 51095521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51161557) 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, 106793 + ... + 107270.

It is an arithmetic number, because the mean of its divisors is an integer number (12843840).

Almost surely, 2^51161057 is an apocalyptic number.

It is an amenable number.

51161057 is a deficient number, since it is larger than the sum of its proper divisors (214303).

51161057 is a wasteful number, since it uses less digits than its factorization.

51161057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214302.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 51161057 is about 7152.6957855063. The cubic root of 51161057 is about 371.2329383340.

The spelling of 51161057 in words is "fifty-one million, one hundred sixty-one thousand, fifty-seven".