71515 has 4 divisors (see below), whose sum is σ = 85824.
Its totient is φ = 57208.
The previous prime is 71503. The next prime is 71527. The reversal of 71515 is 51517.
It is a semiprime because it is the product of two primes.
It is an interprime number because it is at equal distance from previous prime (71503) and next prime (71527).
It is a cyclic number.
It is not a de Polignac number, because 71515 - 25 = 71483 is a prime.
It is a super-2 number, since 2×715152 = 10228790450, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 71492 and 71501.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7147 + ... + 7156.
It is an arithmetic number, because the mean of its divisors is an integer number (21456).
271515 is an apocalyptic number.
71515 is a deficient number, since it is larger than the sum of its proper divisors (14309).
71515 is a wasteful number, since it uses less digits than its factorization.
71515 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14308.
The product of its digits is 175, while the sum is 19.
The square root of 71515 is about 267.4228860812.
The cubic root of 71515 is about 41.5080547582.
The spelling of 71515 in words is "seventy-one thousand, five hundred fifteen".