51271761 has 8 divisors (see below), whose sum is σ = 71334720. Its totient is φ = 32694992.

The previous prime is 51271733. The next prime is 51271789. The reversal of 51271761 is 16717215.

It is an interprime number because it is at equal distance from previous prime (51271733) and next prime (51271789).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51271761 - 2⁵ = 51271729 is a prime.

It is a super-2 number, since 2×51271761² = 5257586952082242, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51271721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371466 + ... + 371603.

It is an arithmetic number, because the mean of its divisors is an integer number (8916840).

Almost surely, 2^51271761 is an apocalyptic number.

It is an amenable number.

51271761 is a deficient number, since it is larger than the sum of its proper divisors (20062959).

51271761 is a wasteful number, since it uses less digits than its factorization.

51271761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743095.

The product of its digits is 2940, while the sum is 30.

The square root of 51271761 is about 7160.4302245047. The cubic root of 51271761 is about 371.5005075026.

Adding to 51271761 its reverse (16717215), we get a palindrome (67988976).

The spelling of 51271761 in words is "fifty-one million, two hundred seventy-one thousand, seven hundred sixty-one".