71342831 has 4 divisors (see below), whose sum is σ = 81534672. Its totient is φ = 61150992.

The previous prime is 71342807. The next prime is 71342833. The reversal of 71342831 is 13824317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13824317 = 13 ⋅1063409.

It is not a de Polignac number, because 71342831 - 2¹⁰ = 71341807 is a prime.

It is a super-2 number, since 2×71342831² = 10179599070189122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71342794 and 71342803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71342833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5095910 + ... + 5095923.

It is an arithmetic number, because the mean of its divisors is an integer number (20383668).

Almost surely, 2^71342831 is an apocalyptic number.

71342831 is a deficient number, since it is larger than the sum of its proper divisors (10191841).

71342831 is a wasteful number, since it uses less digits than its factorization.

71342831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191840.

The product of its digits is 4032, while the sum is 29.

The square root of 71342831 is about 8446.4685520044. The cubic root of 71342831 is about 414.7471842861.

The spelling of 71342831 in words is "seventy-one million, three hundred forty-two thousand, eight hundred thirty-one".