71155141 has 2 divisors, whose sum is σ = 71155142. Its totient is φ = 71155140.

The previous prime is 71155129. The next prime is 71155163. The reversal of 71155141 is 14155117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 1766241 = 8330^2 + 1329^2 .

It is an emirp because it is prime and its reverse (14155117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71155141 - 2¹³ = 71146949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71150141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35577570 + 35577571.

It is an arithmetic number, because the mean of its divisors is an integer number (35577571).

Almost surely, 2^71155141 is an apocalyptic number.

It is an amenable number.

71155141 is a deficient number, since it is larger than the sum of its proper divisors (1).

71155141 is an equidigital number, since it uses as much as digits as its factorization.

71155141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 700, while the sum is 25.

The square root of 71155141 is about 8435.3506743940. The cubic root of 71155141 is about 414.3831567575.

The spelling of 71155141 in words is "seventy-one million, one hundred fifty-five thousand, one hundred forty-one".