71540851 has 2 divisors, whose sum is σ = 71540852. Its totient is φ = 71540850.

The previous prime is 71540837. The next prime is 71540857. The reversal of 71540851 is 15804517.

It is a strong prime.

It is an emirp because it is prime and its reverse (15804517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71540851 - 2⁷ = 71540723 is a prime.

It is not a weakly prime, because it can be changed into another prime (71540857) 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, 35770425 + 35770426.

It is an arithmetic number, because the mean of its divisors is an integer number (35770426).

Almost surely, 2^71540851 is an apocalyptic number.

71540851 is a deficient number, since it is larger than the sum of its proper divisors (1).

71540851 is an equidigital number, since it uses as much as digits as its factorization.

71540851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 71540851 is about 8458.1824879817. The cubic root of 71540851 is about 415.1305555273.

The spelling of 71540851 in words is "seventy-one million, five hundred forty thousand, eight hundred fifty-one".