71155291 has 2 divisors, whose sum is σ = 71155292. Its totient is φ = 71155290.

The previous prime is 71155283. The next prime is 71155297. The reversal of 71155291 is 19255117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71155291 - 2³ = 71155283 is a prime.

It is not a weakly prime, because it can be changed into another prime (71155297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35577645 + 35577646.

It is an arithmetic number, because the mean of its divisors is an integer number (35577646).

Almost surely, 2^71155291 is an apocalyptic number.

71155291 is a deficient number, since it is larger than the sum of its proper divisors (1).

71155291 is an equidigital number, since it uses as much as digits as its factorization.

71155291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3150, while the sum is 31.

The square root of 71155291 is about 8435.3595655431. The cubic root of 71155291 is about 414.3834479402.

The spelling of 71155291 in words is "seventy-one million, one hundred fifty-five thousand, two hundred ninety-one".