71145018 has 24 divisors (see below), whose sum is σ = 176168928. Its totient is φ = 20327112.

The previous prime is 71145013. The next prime is 71145023. The reversal of 71145018 is 81054117.

It is an interprime number because it is at equal distance from previous prime (71145013) and next prime (71145023).

It is a super-2 number, since 2×71145018² = 10123227172440648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71144982 and 71145000.

It is not an unprimeable number, because it can be changed into a prime (71145013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282196 + ... + 282447.

It is an arithmetic number, because the mean of its divisors is an integer number (7340372).

Almost surely, 2^71145018 is an apocalyptic number.

71145018 is an abundant number, since it is smaller than the sum of its proper divisors (105023910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71145018 is a wasteful number, since it uses less digits than its factorization.

71145018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564658 (or 564655 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 71145018 is about 8434.7506187202. The cubic root of 71145018 is about 414.3635048646.

Subtracting 71145018 from its reverse (81054117), we obtain a palindrome (9909099).

The spelling of 71145018 in words is "seventy-one million, one hundred forty-five thousand, eighteen".