51164471 has 2 divisors, whose sum is σ = 51164472. Its totient is φ = 51164470.

The previous prime is 51164461. The next prime is 51164521. The reversal of 51164471 is 17446115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51164471 is a prime.

It is a super-3 number, since 3×51164471³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51164401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25582235 + 25582236.

It is an arithmetic number, because the mean of its divisors is an integer number (25582236).

Almost surely, 2^51164471 is an apocalyptic number.

51164471 is a deficient number, since it is larger than the sum of its proper divisors (1).

51164471 is an equidigital number, since it uses as much as digits as its factorization.

51164471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 51164471 is about 7152.9344328045. The cubic root of 51164471 is about 371.2411956631.

The spelling of 51164471 in words is "fifty-one million, one hundred sixty-four thousand, four hundred seventy-one".