71311255 has 4 divisors (see below), whose sum is σ = 85573512. Its totient is φ = 57049000.

The previous prime is 71311241. The next prime is 71311271. The reversal of 71311255 is 55211317.

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

It is a de Polignac number, because none of the positive numbers 2^k-71311255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7131121 + ... + 7131130.

It is an arithmetic number, because the mean of its divisors is an integer number (21393378).

Almost surely, 2^71311255 is an apocalyptic number.

71311255 is a deficient number, since it is larger than the sum of its proper divisors (14262257).

71311255 is a wasteful number, since it uses less digits than its factorization.

71311255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14262256.

The product of its digits is 1050, while the sum is 25.

The square root of 71311255 is about 8444.5991615944. The cubic root of 71311255 is about 414.6859868751.

The spelling of 71311255 in words is "seventy-one million, three hundred eleven thousand, two hundred fifty-five".