71230111 has 4 divisors (see below), whose sum is σ = 72233424. Its totient is φ = 70226800.

The previous prime is 71230087. The next prime is 71230121. The reversal of 71230111 is 11103217.

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

It is a cyclic number.

It is not a de Polignac number, because 71230111 - 2¹¹ = 71228063 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 (71230121) 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, 501550 + ... + 501691.

It is an arithmetic number, because the mean of its divisors is an integer number (18058356).

Almost surely, 2^71230111 is an apocalyptic number.

71230111 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

71230111 is a deficient number, since it is larger than the sum of its proper divisors (1003313).

71230111 is a wasteful number, since it uses less digits than its factorization.

71230111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003312.

The product of its (nonzero) digits is 42, while the sum is 16.

The square root of 71230111 is about 8439.7933031562. The cubic root of 71230111 is about 414.5286388716.

Adding to 71230111 its reverse (11103217), we get a palindrome (82333328).

The spelling of 71230111 in words is "seventy-one million, two hundred thirty thousand, one hundred eleven".