71522545 has 16 divisors (see below), whose sum is σ = 88672320. Its totient is φ = 55347264.

The previous prime is 71522543. The next prime is 71522551. The reversal of 71522545 is 54522517.

It is a cyclic number.

It is not a de Polignac number, because 71522545 - 2¹ = 71522543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71522543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21451 + ... + 24559.

It is an arithmetic number, because the mean of its divisors is an integer number (5542020).

Almost surely, 2^71522545 is an apocalyptic number.

It is an amenable number.

71522545 is a deficient number, since it is larger than the sum of its proper divisors (17149775).

71522545 is a wasteful number, since it uses less digits than its factorization.

71522545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264.

The product of its digits is 14000, while the sum is 31.

The square root of 71522545 is about 8457.1002713696. The cubic root of 71522545 is about 415.0951443922.

The spelling of 71522545 in words is "seventy-one million, five hundred twenty-two thousand, five hundred forty-five".