51471081 has 6 divisors (see below), whose sum is σ = 74347130. Its totient is φ = 34314048.

The previous prime is 51471071. The next prime is 51471083. The reversal of 51471081 is 18017415.

51471081 is a `hidden beast` number, since 514 + 71 + 0 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42968025 + 8503056 = 6555^2 + 2916^2 .

It is not a de Polignac number, because 51471081 - 2¹³ = 51462889 is a prime.

It is a super-2 number, since 2×51471081² = 5298544358617122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51471083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2859496 + ... + 2859513.

Almost surely, 2^51471081 is an apocalyptic number.

It is an amenable number.

51471081 is a deficient number, since it is larger than the sum of its proper divisors (22876049).

51471081 is a wasteful number, since it uses less digits than its factorization.

51471081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719015 (or 5719012 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 51471081 is about 7174.3348820640. The cubic root of 51471081 is about 371.9812902487.

Adding to 51471081 its reverse (18017415), we get a palindrome (69488496).

The spelling of 51471081 in words is "fifty-one million, four hundred seventy-one thousand, eighty-one".