51709571 has 2 divisors, whose sum is σ = 51709572. Its totient is φ = 51709570.

The previous prime is 51709549. The next prime is 51709577. The reversal of 51709571 is 17590715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51709571 - 2²² = 47515267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51709577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25854785 + 25854786.

It is an arithmetic number, because the mean of its divisors is an integer number (25854786).

Almost surely, 2^51709571 is an apocalyptic number.

51709571 is a deficient number, since it is larger than the sum of its proper divisors (1).

51709571 is an equidigital number, since it uses as much as digits as its factorization.

51709571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 51709571 is about 7190.9367261853. The cubic root of 51709571 is about 372.5549272635.

It can be divided in two parts, 5170 and 9571, that added together give a palindrome (14741).

The spelling of 51709571 in words is "fifty-one million, seven hundred nine thousand, five hundred seventy-one".