51671811 has 8 divisors (see below), whose sum is σ = 72521920. Its totient is φ = 32634792.

The previous prime is 51671801. The next prime is 51671821. The reversal of 51671811 is 11817615.

It is an interprime number because it is at equal distance from previous prime (51671801) and next prime (51671821).

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

It is not a de Polignac number, because 51671811 - 2¹¹ = 51669763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51671801) 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, 453205 + ... + 453318.

It is an arithmetic number, because the mean of its divisors is an integer number (9065240).

Almost surely, 2^51671811 is an apocalyptic number.

51671811 is a deficient number, since it is larger than the sum of its proper divisors (20850109).

51671811 is a wasteful number, since it uses less digits than its factorization.

51671811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906545.

The product of its digits is 1680, while the sum is 30.

The square root of 51671811 is about 7188.3107194945. The cubic root of 51671811 is about 372.4642212982.

It can be divided in two parts, 516 and 71811, that added together give a palindrome (72327).

The spelling of 51671811 in words is "fifty-one million, six hundred seventy-one thousand, eight hundred eleven".