71513487 has 12 divisors (see below), whose sum is σ = 105048840. Its totient is φ = 46867248.

The previous prime is 71513459. The next prime is 71513503. The reversal of 71513487 is 78431517.

It is not a de Polignac number, because 71513487 - 2⁸ = 71513231 is a prime.

It is a super-2 number, since 2×71513487² = 10228357645798338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71513437) 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 11 ways as a sum of consecutive naturals, for example, 66808 + ... + 67869.

It is an arithmetic number, because the mean of its divisors is an integer number (8754070).

Almost surely, 2^71513487 is an apocalyptic number.

71513487 is a deficient number, since it is larger than the sum of its proper divisors (33535353).

71513487 is a wasteful number, since it uses less digits than its factorization.

71513487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134742 (or 134739 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 71513487 is about 8456.5647280678. The cubic root of 71513487 is about 415.0776203581.

The spelling of 71513487 in words is "seventy-one million, five hundred thirteen thousand, four hundred eighty-seven".