71067381 has 16 divisors (see below), whose sum is σ = 118138368. Its totient is φ = 36918000.

The previous prime is 71067377. The next prime is 71067421. The reversal of 71067381 is 18376017.

It is not a de Polignac number, because 71067381 - 2² = 71067377 is a prime.

It is a super-3 number, since 3×71067381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71067181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153595 + ... + 154056.

It is an arithmetic number, because the mean of its divisors is an integer number (7383648).

Almost surely, 2^71067381 is an apocalyptic number.

It is an amenable number.

71067381 is a deficient number, since it is larger than the sum of its proper divisors (47070987).

71067381 is a wasteful number, since it uses less digits than its factorization.

71067381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307672.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 71067381 is about 8430.1471517406. The cubic root of 71067381 is about 414.2127252821.

The spelling of 71067381 in words is "seventy-one million, sixty-seven thousand, three hundred eighty-one".