71447513 has 4 divisors (see below), whose sum is σ = 72453888. Its totient is φ = 70441140.

The previous prime is 71447507. The next prime is 71447539. The reversal of 71447513 is 31574417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71447513 - 2¹⁰ = 71446489 is a prime.

It is a super-2 number, since 2×71447513² = 10209494227770338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71447513.

It is not an unprimeable number, because it can be changed into a prime (71447573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503081 + ... + 503222.

It is an arithmetic number, because the mean of its divisors is an integer number (18113472).

Almost surely, 2^71447513 is an apocalyptic number.

It is an amenable number.

71447513 is a deficient number, since it is larger than the sum of its proper divisors (1006375).

71447513 is a wasteful number, since it uses less digits than its factorization.

71447513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006374.

The product of its digits is 11760, while the sum is 32.

The square root of 71447513 is about 8452.6630714823. The cubic root of 71447513 is about 414.9499392850.

The spelling of 71447513 in words is "seventy-one million, four hundred forty-seven thousand, five hundred thirteen".