71642311 has 12 divisors (see below), whose sum is σ = 77943360. Its totient is φ = 65819520.

The previous prime is 71642303. The next prime is 71642327. The reversal of 71642311 is 11324617.

It is not a de Polignac number, because 71642311 - 2³ = 71642303 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 (71642341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39850 + ... + 41608.

It is an arithmetic number, because the mean of its divisors is an integer number (6495280).

Almost surely, 2^71642311 is an apocalyptic number.

71642311 is a deficient number, since it is larger than the sum of its proper divisors (6301049).

71642311 is a wasteful number, since it uses less digits than its factorization.

71642311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2013 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 71642311 is about 8464.1781054040. The cubic root of 71642311 is about 415.3267103581.

Adding to 71642311 its reverse (11324617), we get a palindrome (82966928).

The spelling of 71642311 in words is "seventy-one million, six hundred forty-two thousand, three hundred eleven".