71513001 has 36 divisors (see below), whose sum is σ = 124061184. Its totient is φ = 39538800.

The previous prime is 71512967. The next prime is 71513009. The reversal of 71513001 is 10031517.

It is a happy number.

It is not a de Polignac number, because 71513001 - 2⁶ = 71512937 is a prime.

It is a super-2 number, since 2×71513001² = 10228218624052002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71513009) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11056 + ... + 16286.

It is an arithmetic number, because the mean of its divisors is an integer number (3446144).

Almost surely, 2^71513001 is an apocalyptic number.

It is an amenable number.

71513001 is a deficient number, since it is larger than the sum of its proper divisors (52548183).

71513001 is a wasteful number, since it uses less digits than its factorization.

71513001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282 (or 5272 counting only the distinct ones).

The product of its (nonzero) digits is 105, while the sum is 18.

The square root of 71513001 is about 8456.5359929465. The cubic root of 71513001 is about 415.0766800777.

Adding to 71513001 its reverse (10031517), we get a palindrome (81544518).

The spelling of 71513001 in words is "seventy-one million, five hundred thirteen thousand, one".