71311351 has 4 divisors (see below), whose sum is σ = 75064600. Its totient is φ = 67558104.

The previous prime is 71311349. The next prime is 71311381. The reversal of 71311351 is 15311317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15311317 = 7 ⋅2187331.

It is a cyclic number.

It is not a de Polignac number, because 71311351 - 2¹ = 71311349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71311381) 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, 1876596 + ... + 1876633.

It is an arithmetic number, because the mean of its divisors is an integer number (18766150).

Almost surely, 2^71311351 is an apocalyptic number.

71311351 is a deficient number, since it is larger than the sum of its proper divisors (3753249).

71311351 is a wasteful number, since it uses less digits than its factorization.

71311351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3753248.

The product of its digits is 315, while the sum is 22.

The square root of 71311351 is about 8444.6048456988. The cubic root of 71311351 is about 414.6861729599.

Adding to 71311351 its reverse (15311317), we get a palindrome (86622668).

The spelling of 71311351 in words is "seventy-one million, three hundred eleven thousand, three hundred fifty-one".