71355481 has 2 divisors, whose sum is σ = 71355482. Its totient is φ = 71355480.

The previous prime is 71355463. The next prime is 71355509. The reversal of 71355481 is 18455317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52693081 + 18662400 = 7259^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 71355481 - 2¹¹ = 71353433 is a prime.

It is a super-2 number, since 2×71355481² = 10183209337482722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71355451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35677740 + 35677741.

It is an arithmetic number, because the mean of its divisors is an integer number (35677741).

Almost surely, 2^71355481 is an apocalyptic number.

It is an amenable number.

71355481 is a deficient number, since it is larger than the sum of its proper divisors (1).

71355481 is an equidigital number, since it uses as much as digits as its factorization.

71355481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 71355481 is about 8447.2173524777. The cubic root of 71355481 is about 414.7716961711.

The spelling of 71355481 in words is "seventy-one million, three hundred fifty-five thousand, four hundred eighty-one".