71271751 has 2 divisors, whose sum is σ = 71271752. Its totient is φ = 71271750.

The previous prime is 71271727. The next prime is 71271797. The reversal of 71271751 is 15717217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71271751 - 2¹⁹ = 70747463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71275751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35635875 + 35635876.

It is an arithmetic number, because the mean of its divisors is an integer number (35635876).

Almost surely, 2^71271751 is an apocalyptic number.

71271751 is a deficient number, since it is larger than the sum of its proper divisors (1).

71271751 is an equidigital number, since it uses as much as digits as its factorization.

71271751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3430, while the sum is 31.

The square root of 71271751 is about 8442.2598277949. The cubic root of 71271751 is about 414.6093987725.

Adding to 71271751 its reverse (15717217), we get a palindrome (86988968).

The spelling of 71271751 in words is "seventy-one million, two hundred seventy-one thousand, seven hundred fifty-one".