71505130 has 32 divisors (see below), whose sum is σ = 132580800. Its totient is φ = 27750912.

The previous prime is 71505121. The next prime is 71505139. The reversal of 71505130 is 3150517.

It is an interprime number because it is at equal distance from previous prime (71505121) and next prime (71505139).

It is a super-2 number, since 2×71505130² = 10225967232633800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71505139) 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, 76506 + ... + 77434.

It is an arithmetic number, because the mean of its divisors is an integer number (4143150).

Almost surely, 2^71505130 is an apocalyptic number.

71505130 is a deficient number, since it is larger than the sum of its proper divisors (61075670).

71505130 is a wasteful number, since it uses less digits than its factorization.

71505130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 71505130 is about 8456.0706004621. The cubic root of 71505130 is about 415.0614511992.

Adding to 71505130 its reverse (3150517), we get a palindrome (74655647).

The spelling of 71505130 in words is "seventy-one million, five hundred five thousand, one hundred thirty".