71350381 has 4 divisors (see below), whose sum is σ = 71744764. Its totient is φ = 70956000.

The previous prime is 71350379. The next prime is 71350417. The reversal of 71350381 is 18305317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18305317 = 593 ⋅30869.

It can be written as a sum of positive squares in 2 ways, for example, as 28185481 + 43164900 = 5309^2 + 6570^2 .

It is a cyclic number.

It is not a de Polignac number, because 71350381 - 2¹ = 71350379 is a prime.

It is a super-2 number, since 2×71350381² = 10181753737690322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71350781) 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 in 3 ways as a sum of consecutive naturals, for example, 196920 + ... + 197281.

It is an arithmetic number, because the mean of its divisors is an integer number (17936191).

Almost surely, 2^71350381 is an apocalyptic number.

It is an amenable number.

71350381 is a deficient number, since it is larger than the sum of its proper divisors (394383).

71350381 is a wasteful number, since it uses less digits than its factorization.

71350381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394382.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 71350381 is about 8446.9154725261. The cubic root of 71350381 is about 414.7618142577.

Adding to 71350381 its reverse (18305317), we get a palindrome (89655698).

The spelling of 71350381 in words is "seventy-one million, three hundred fifty thousand, three hundred eighty-one".