71381853 has 12 divisors (see below), whose sum is σ = 103192960. Its totient is φ = 47548296.

The previous prime is 71381837. The next prime is 71381873. The reversal of 71381853 is 35818317.

It is not a de Polignac number, because 71381853 - 2⁴ = 71381837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71381833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11700 + ... + 16722.

Almost surely, 2^71381853 is an apocalyptic number.

It is an amenable number.

71381853 is a deficient number, since it is larger than the sum of its proper divisors (31811107).

71381853 is a wasteful number, since it uses less digits than its factorization.

71381853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6608 (or 6605 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 71381853 is about 8448.7781956920. The cubic root of 71381853 is about 414.8227878403.

It can be divided in two parts, 71 and 381853, that added together give a square (381924 = 618²).

The spelling of 71381853 in words is "seventy-one million, three hundred eighty-one thousand, eight hundred fifty-three".