51071657 has 16 divisors (see below), whose sum is σ = 64200192. Its totient is φ = 39545280.

The previous prime is 51071651. The next prime is 51071693. The reversal of 51071657 is 75617015.

It is a cyclic number.

It is not a de Polignac number, because 51071657 - 2⁴ = 51071641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51071651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1694 + ... + 10247.

It is an arithmetic number, because the mean of its divisors is an integer number (4012512).

Almost surely, 2^51071657 is an apocalyptic number.

It is an amenable number.

51071657 is a deficient number, since it is larger than the sum of its proper divisors (13128535).

51071657 is a wasteful number, since it uses less digits than its factorization.

51071657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12008.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 51071657 is about 7146.4436610107. The cubic root of 51071657 is about 371.0165786214.

The spelling of 51071657 in words is "fifty-one million, seventy-one thousand, six hundred fifty-seven".