71391351 has 4 divisors (see below), whose sum is σ = 95188472. Its totient is φ = 47594232.

The previous prime is 71391343. The next prime is 71391377. The reversal of 71391351 is 15319317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71391351 - 2³ = 71391343 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 (71391311) 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, 11898556 + ... + 11898561.

It is an arithmetic number, because the mean of its divisors is an integer number (23797118).

Almost surely, 2^71391351 is an apocalyptic number.

71391351 is a deficient number, since it is larger than the sum of its proper divisors (23797121).

71391351 is a wasteful number, since it uses less digits than its factorization.

71391351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23797120.

The product of its digits is 2835, while the sum is 30.

The square root of 71391351 is about 8449.3402701039. The cubic root of 71391351 is about 414.8411856634.

The spelling of 71391351 in words is "seventy-one million, three hundred ninety-one thousand, three hundred fifty-one".