71506365 has 32 divisors (see below), whose sum is σ = 131072256. Its totient is φ = 32609280.

The previous prime is 71506361. The next prime is 71506397. The reversal of 71506365 is 56360517.

It is not a de Polignac number, because 71506365 - 2² = 71506361 is a prime.

It is a super-2 number, since 2×71506365² = 10226320471026450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71506361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80725 + ... + 81605.

It is an arithmetic number, because the mean of its divisors is an integer number (4096008).

Almost surely, 2^71506365 is an apocalyptic number.

It is an amenable number.

71506365 is a deficient number, since it is larger than the sum of its proper divisors (59565891).

71506365 is a wasteful number, since it uses less digits than its factorization.

71506365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 71506365 is about 8456.1436246081. The cubic root of 71506365 is about 415.0638407617.

The spelling of 71506365 in words is "seventy-one million, five hundred six thousand, three hundred sixty-five".