71522487 has 16 divisors (see below), whose sum is σ = 109378560. Its totient is φ = 46143000.

The previous prime is 71522483. The next prime is 71522501. The reversal of 71522487 is 78422517.

It is not a de Polignac number, because 71522487 - 2² = 71522483 is a prime.

It is a super-2 number, since 2×71522487² = 10230932293330338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71522483) 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 15 ways as a sum of consecutive naturals, for example, 41889 + ... + 43562.

It is an arithmetic number, because the mean of its divisors is an integer number (6836160).

Almost surely, 2^71522487 is an apocalyptic number.

71522487 is a deficient number, since it is larger than the sum of its proper divisors (37856073).

71522487 is a wasteful number, since it uses less digits than its factorization.

71522487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85491 (or 85485 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 71522487 is about 8457.0968422976. The cubic root of 71522487 is about 415.0950321874.

The spelling of 71522487 in words is "seventy-one million, five hundred twenty-two thousand, four hundred eighty-seven".