71342513 has 4 divisors (see below), whose sum is σ = 77828208. Its totient is φ = 64856820.

The previous prime is 71342477. The next prime is 71342519. The reversal of 71342513 is 31524317.

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 71342513 - 2⁶ = 71342449 is a prime.

It is a super-2 number, since 2×71342513² = 10179508322310338, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71342519) 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, 3242831 + ... + 3242852.

It is an arithmetic number, because the mean of its divisors is an integer number (19457052).

Almost surely, 2^71342513 is an apocalyptic number.

It is an amenable number.

71342513 is a deficient number, since it is larger than the sum of its proper divisors (6485695).

71342513 is a wasteful number, since it uses less digits than its factorization.

71342513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485694.

The product of its digits is 2520, while the sum is 26.

The square root of 71342513 is about 8446.4497275483. The cubic root of 71342513 is about 414.7465680606.

The spelling of 71342513 in words is "seventy-one million, three hundred forty-two thousand, five hundred thirteen".