71511485 has 16 divisors (see below), whose sum is σ = 90353664. Its totient is φ = 54227712.

The previous prime is 71511467. The next prime is 71511493. The reversal of 71511485 is 58411517.

It is a cyclic number.

It is not a de Polignac number, because 71511485 - 2²² = 67317181 is a prime.

It is a super-2 number, since 2×71511485² = 10227784973810450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10244 + ... + 15746.

It is an arithmetic number, because the mean of its divisors is an integer number (5647104).

Almost surely, 2^71511485 is an apocalyptic number.

It is an amenable number.

71511485 is a deficient number, since it is larger than the sum of its proper divisors (18842179).

71511485 is a wasteful number, since it uses less digits than its factorization.

71511485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644.

The product of its digits is 5600, while the sum is 32.

The square root of 71511485 is about 8456.4463576611. The cubic root of 71511485 is about 415.0737469948.

Adding to 71511485 its sum of digits (32), we get a palindrome (71511517).

The spelling of 71511485 in words is "seventy-one million, five hundred eleven thousand, four hundred eighty-five".