71510140 has 24 divisors (see below), whose sum is σ = 161723520. Its totient is φ = 26403648.

The previous prime is 71510123. The next prime is 71510141. The reversal of 71510140 is 4101517.

It is a super-2 number, since 2×71510140² = 10227400245639200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71510141) 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 7 ways as a sum of consecutive naturals, for example, 137260 + ... + 137779.

It is an arithmetic number, because the mean of its divisors is an integer number (6738480).

Almost surely, 2^71510140 is an apocalyptic number.

It is an amenable number.

71510140 is an abundant number, since it is smaller than the sum of its proper divisors (90213380).

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

71510140 is a wasteful number, since it uses less digits than its factorization.

71510140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275061 (or 275059 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 71510140 is about 8456.3668321567. The cubic root of 71510140 is about 415.0711447196.

Adding to 71510140 its reverse (4101517), we get a palindrome (75611657).

The spelling of 71510140 in words is "seventy-one million, five hundred ten thousand, one hundred forty".