71500540 has 48 divisors (see below), whose sum is σ = 154365120. Its totient is φ = 27809280.

The previous prime is 71500531. The next prime is 71500547. The reversal of 71500540 is 4500517.

It is a super-2 number, since 2×71500540² = 10224654440583200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71500547) 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 15 ways as a sum of consecutive naturals, for example, 125376 + ... + 125944.

It is an arithmetic number, because the mean of its divisors is an integer number (3215940).

Almost surely, 2^71500540 is an apocalyptic number.

It is an amenable number.

71500540 is an abundant number, since it is smaller than the sum of its proper divisors (82864580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71500540 is a wasteful number, since it uses less digits than its factorization.

71500540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 71500540 is about 8455.7991934530. The cubic root of 71500540 is about 415.0525699118.

The spelling of 71500540 in words is "seventy-one million, five hundred thousand, five hundred forty".