51517471 has 2 divisors, whose sum is σ = 51517472. Its totient is φ = 51517470.

The previous prime is 51517457. The next prime is 51517481. The reversal of 51517471 is 17471515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51517471 - 2¹³ = 51509279 is a prime.

It is a super-3 number, since 3×51517471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51517421) 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 as a sum of consecutive naturals, namely, 25758735 + 25758736.

It is an arithmetic number, because the mean of its divisors is an integer number (25758736).

Almost surely, 2^51517471 is an apocalyptic number.

51517471 is a deficient number, since it is larger than the sum of its proper divisors (1).

51517471 is an equidigital number, since it uses as much as digits as its factorization.

51517471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4900, while the sum is 31.

The square root of 51517471 is about 7177.5672062336. The cubic root of 51517471 is about 372.0930101380.

Adding to 51517471 its reverse (17471515), we get a palindrome (68988986).

The spelling of 51517471 in words is "fifty-one million, five hundred seventeen thousand, four hundred seventy-one".