71851533 has 12 divisors (see below), whose sum is σ = 103739040. Its totient is φ = 44216016.

The previous prime is 71851529. The next prime is 71851547. The reversal of 71851533 is 33515817.

It is not a de Polignac number, because 71851533 - 2² = 71851529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71851494 and 71851503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71851513) 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 11 ways as a sum of consecutive naturals, for example, 70353 + ... + 71366.

It is an arithmetic number, because the mean of its divisors is an integer number (8644920).

Almost surely, 2^71851533 is an apocalyptic number.

It is an amenable number.

71851533 is a deficient number, since it is larger than the sum of its proper divisors (31887507).

71851533 is a wasteful number, since it uses less digits than its factorization.

71851533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141748 (or 141735 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 71851533 is about 8476.5283577653. The cubic root of 71851533 is about 415.7306198718.

The spelling of 71851533 in words is "seventy-one million, eight hundred fifty-one thousand, five hundred thirty-three".