71540527 has 2 divisors, whose sum is σ = 71540528. Its totient is φ = 71540526.

The previous prime is 71540501. The next prime is 71540543. The reversal of 71540527 is 72504517.

It is a strong prime.

It is an emirp because it is prime and its reverse (72504517) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71540527 is a prime.

It is a super-3 number, since 3×71540527³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71540827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35770263 + 35770264.

It is an arithmetic number, because the mean of its divisors is an integer number (35770264).

Almost surely, 2^71540527 is an apocalyptic number.

71540527 is a deficient number, since it is larger than the sum of its proper divisors (1).

71540527 is an equidigital number, since it uses as much as digits as its factorization.

71540527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 71540527 is about 8458.1633349091. The cubic root of 71540527 is about 415.1299288341.

The spelling of 71540527 in words is "seventy-one million, five hundred forty thousand, five hundred twenty-seven".